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Review of roll-to-roll fabrication techniques for colloidal quantum dot solar cells

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Journal of Electronic Science and Technology 2023年第1期21卷 1-25页

作者： Yin-Fen Ma You-Mei Wang Jia Wen Ao Li Xiao-Liang Li Mei Leng Yong-Biao Zhao Zheng-Hong Lu Key Laboratory of Yunnan Provincial Higher Education Institutions for Optoelectronics Device Engineering Department of PhysicsSchool of Physics and AstronomyYunnan UniversityKunming650091China International Joint Research Center for Optoelectronic and Engineering Research Yunnan UniversityKunming650091China Department of Materials Science and Engineering University of TorontoTorontoM5S 3E4Canada

Colloidal quantum dots(CQDs)are of great interest to photovoltaic(PV)technologies as they possess the benefits of solution-processability,size-tunability,and roll-to-roll manufacturability,as well as unique capabilities to harvest near-infrared(NIR)radiation.During the last decade,lab-scale CQD solar cells have achieved rapid improvement in the power conversion efficiency(PCE)from~1%to 18%,which will potentially exceed 20%in the next few years and approach the performance of other PV technologies,such as perovskite solar cells and organic solar cells.In the meanwhile,CQD solar cells exhibit long lifetimes either under shelf storage or continuous operation,making them highly attractive to industry.However,in order to meet the industrial requirements,mass production techniques are necessary to scale up the fabrication of those lab devices into large-area PV modules,such as roll-to-toll coating.This paper reviews the recent developments of large-area CQD solar cells with a focus on various fabrication methods and their principles.It covers the progress of typical large-area coating techniques,including spray coating,blade coating,dip coating,and slot-die coating.It also discusses next steps and new strategies to accomplish the ultimate goal of the low-cost large-area fabrication of CQD solar cells and emphasizes how artificial intelligence or machine learning could facilitate the developments of CQD solar cell research.

关键词： Colloidal quantum dots(CQDs) Large-area fabrication Roll-to-roll solar cells

MOFs in Emerging solar cells

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Chinese Journal of Chemistry 2023年第6期41卷 695-709页

作者： Jie Dou Qi Chen Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications Experimental Centerof Advanced MaterialsSchool of Materials Science&EngineeringBeijing Institute of TechnologyBeijing100081China Bejing Instituteof Technology Chongqing Innovation Center Chongqing 404100China

Metal-organic framework(MOF)materials have attracted intense scientific interest in the solar cell research community owing to their unique physiochemical properties and various preparation methods.The photovoltaic performance and stability of resultant optoelectronic devices can also be improved by adopting MOF materials.This review pays close attention to the summary and generalization of recent representative achievements in solar cells by utilizing MOFs,including dye-sensitized solar cells,perovskite solar cells,organic solar cells,and so on.

关键词： MOFs Synthetic methods solar cells Photochemistry Sustainable chemistry Green chemistry

Intermediate phase assisted sequential deposition of reverse-graded quasi-2D alternating cation perovskites for MA-free perovskite solar cells

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InfoMat 2023年第3期5卷 134-149页

作者： Shaofu Wang Yumin Liu Junjie Zou Junjun Jin Yun Jiang Tao Zeng Wenyan Zhao Rong-Xiang He Bolei Chen Yu Chen Shuoxue Jin Hong-Xiang Li Zhipeng Xie Chang-An Wang Weiwei Sun Qiang Cao Xing-Zhong Zhao School of Materials Science and Engineering National Engineering Research Center for Domestic&Building CeramicsJingdezhen Ceramic UniversityJingdezhenthe People Republic of China School of Physics and Technology Institute of Technological SciencesKey Laboratory of Artificial Micro/Nano StructuresMinistry of EducationWuhan UniversityWuhanthe People Republic of China Institute for Interdisciplinary Research(IIR) Key Laboratory of Optoelectronic Chemical Materials and DevicesMinistry of EducationJianghan UniversityWuhanthe People Republic of China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijingthe People Republic of China College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengduthe People Republic of China College of Aerospace Science and Engineering National University of Defense TechnologyChangshathe People Republic of China

One-step deposition approaches have been widely applied and developed in the fabrication of quasi-2D perovskites.However,the regulation of quantum wells(QWs)and crystalline orientation is difficult and complicated when using this methodology.Sequential deposition is another widespread synthetic approach for preparing perovskite films and perovskite dimension engineering.In this article,δ-CsPbI_(3)intermediate phase assisted sequential(IPAS)deposition is successfully carried out to fabricate MA-free quasi-2D ACI perovskites.The amount of theδ-CsPbI_(3)intermediate phase in the PbI2 layer and the concentration of GAI molecule in the IPA solution both play important roles in the production of MA-free quasi-2D ACI perovskite films.The n value of the MA-free quasi-2D ACI perovskites can be adjusted,which affects the photovoltaic performance and device stability.Compared with one-step deposition,the MA-free quasi-2D ACI perovskites prepared via IPAS deposition have opposite reverse-graded QW distribution and improved vertical orientation,leading to a remarkable PEC of up to 18.86%and allowing the preparation of unpackaged devices with prominent working stability(80%,400 h).The underlying mechanism and crystallization pathway of IPAS deposition confirm that sequential deposition has unique superiority in regulating the QW distribution and crystalline orientation of quasi-2D perovskites.

关键词： intermediate phase quantum well distribution quasi-2D perovskite sequential deposition solar cells

Tuning crystal orientation and charge transport of quasi-2D perovskites via halogen-substituted benzylammonium for efficient solar cells

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Journal of Energy Chemistry 2022年第3期31卷 205-209,I0007页

作者： Guiqiang Cheng Jian Wang Rong Yang Cheng Li Hao Zhang Nana Wang Renzhi Li Jianpu Wang Wei Huang Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) Nanjing Tech University(NanjingTech)Nanjing 211816JiangsuChina Frontiers Science Center for Flexible Electronics Xi’an Institute of Flexible Electronics(IFE)Xi’an Institute of Biomedical Materials and EngineeringNorthwestern Polytechnical University(NPU)Xi’an 710072ShaanxiChina School of Electronic Science and Engineering Xiamen UniversityXiamen 361005FujianChina

Quasi-two-dimensional(quasi-2D)perovskites with high stability usually suffers from poor device efficiency.Chemical tuning of the spacer cations has been an effective strategy to achieve efficient and stable quasi-2D perovskite solar cells.Here,we demonstrate that 3-halogon-substituted benzylammonium iodide(3X-BAI,X=F,Cl,Br,I)can significantly affect the orientation of low-dimensional perovskites and charge transport from perovskite to hole extraction layer,as well as device performance.With 3Br-BAI,we achieve the highest device efficiency of 13.21%for quasi-2D perovskites with a nominal n=3 average composition.Our work provides a facile approach to regulate vertical crystal orientation and charge transport via tuning the molecular structure of organic spacer toward high performance quasi-2D perovskite solar cells.

关键词： Perovskites solar cells Quasi-two dimensional Orientation Charge transport

Black-phosphorus-based materials for application in solar cells

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Chinese Journal of Structural Chemistry 2023年第7期42卷 34-46页

作者： Xiaofeng Lin Xiaoxin Li Beichi Luo Dingshan Yu School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou510006PR China Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education Sun Yat-Sen University Guangzhou510275PR China

In the context of green development,the use of solar cells with renewable and environment-friendly characteristics has been rapidly growing.There has been a continuous search for materials that can enhance their performance.Black phosphorus,a new type of semiconductor material,has garnered significant attention due to its distinctive properties,particularly its direct band gap with tunable layers and high optoelectronic efficiency.This review summarizes the properties of black-phosphorus-based materials and focuses on their use as doping materials in various components of solar cells,such as the electron transport layer,hole transport layer,active layer,etc.The current challenges faced by black phosphorus materials and outlook on their future development have also been discussed.

关键词： Black phosphorus solar cells Doping materials Power conversion efficiency

Lead‑Free Perovskite Materials for solar cells

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Nano-Micro Letters 2021年第4期13卷 110-145页

作者： Minghao Wang Wei Wang Ben Ma Wei Shen Lihui Liu Kun Cao Shufen Chen Wei Huang Key Laboratory for Organic Electronics and Information Displays&Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing University of Posts&Telecommunications(NUPT)9 Wenyuan RoadNanjing 210023People’s Republic of China Frontiers Science Center for Flexible Electronics Xi’an Institute of Flexible Electronics(IFE)and Xi’an Institute of Biomedical Materials&EngineeringNorthwestern Polytechnical University127 West Youyi RoadXi’an 710072People’s Republic of China

The toxicity issue of lead hinders large-scale commercial production and photovoltaic field application of lead halide perovskites.Some novel non-or low-toxic perovskite materials have been explored for development of environmentally friendly lead-free perovskite solar cells(PSCs).This review studies the substitution of equivalent/heterovalent metals for Pb based on first-principles calculation,summarizes the theoretical basis of lead-free perovskites,and screens out some promising lead-free candidates with suitable bandgap,optical,and electrical properties.Then,it reports notable achievements for the experimental studies of lead-free perovskites to date,including the crystal structure and material bandgap for all of lead-free materials and photovoltaic performance and stability for corresponding devices.The review finally discusses challenges facing the successful development and commercialization of lead-free PSCs and predicts the prospect of lead-free PSCs in the future.

关键词： solar cells Perovskite Lead-free First-principles calculation Photovoltaic

Hydroiodic Acid Additive Enhanced the Performance and Stability of PbS-QDs solar cells via Suppressing Hydroxyl Ligand

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纳微快报：英文版 2020年第3期12卷 117-128页

作者： Xiaokun Yang Ji Yang Jahangeer Khan Hui Deng Shengjie Yuan Jian Zhang Yong Xia Feng Deng Xue Zhou Farooq Umar Zhixin Jin Haisheng Song Chun Cheng Mohamed Sabry Jiang Tang Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyLuoyu Road 1037Wuhan 430074People’s Republic of China Department of Materials Science and Engineering and Shenzhen Key Laboratory of Nanoimprint Technology South University of Science and TechnologyShenzhen 518055People’s Republic of China Shenzhen R&D Center of Huazhong University of Science and Technology Shenzhen 518000People’s Republic of China School of Optical and Electronic Information Huazhong University of Science and Technology1037 Luoyu RoadWuhan 430074People’s Republic of China National Center for Magnetic Resonance in Wuhan State Key Laboratory of Magnetic Resonance and Atomic and Molecular PhysicsWuhan Institute of Physics and MathematicsChinese Academy of SciencesWuhan 430071People’s Republic of China Physics Department College of Applied ScienceUmm Al-Qura UniversityMeccaKingdom of Saudi Arabia solar Physics Lab National Research Institute of Astronomy and GeophysicsCairoEgypt

The recent emerging progress of quantum dot ink(QD-ink)has overcome the complexity of multiple-step colloidal QD(CQD)film preparation and pronouncedly promoted the device performance.However,the detrimental hydroxyl(OH)ligands induced from synthesis procedure have not been completely removed.Here,a halide ligand additive strategy was devised to optimize QD-ink process.It simultaneously reduced sub-bandgap states and converted them into iodide-passivated surface,which increase carrier mobility of the QDs films and achieve thicker absorber with improved performances.The corresponding power conversion efficiency of this optimized device reached 10.78%.(The control device was 9.56%.)Therefore,this stratege can support as a candidate strategy to solve the QD original limitation caused by hydroxyl ligands,which is also compatible with other CQD-based optoelectronic devices.

关键词： Hydroxyl ligand HI additive Surface passivation Quantum dots ink solar cells

MXenes for solar cells

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Nano-Micro Letters 2021年第5期13卷 90-106页

作者： Lujie Yin Yingtao Li Xincheng Yao Yanzhou Wang Lin Jia Qiming Liu Junshuai Li Yali Li Deyan He Key Laboratory of Special Function Materials and Structure Design of the Ministry of Education and School of Physical Science and TechnologyLanzhou University222 South Tianshui RoadLanzhou 730000People’s Republic of China

Application of two-dimensional MXene materials in photovoltaics has attracted increasing attention since the first report in 2018 due to their metallic electrical conductivity,high carrier mobility,excellent transparency,tunable work function and superior mechanical property.In this review,all developments and applications of the Ti3C2Tx MXene(here,it is noteworthy that there are still no reports on other MXenes’application in photovoltaics by far)as additive,electrode and hole/electron transport layer in solar cells are detailedly summarized,and meanwhile,the problems existing in the related studies are also discussed.In view of these problems,some suggestions are given for pushing exploration of the MXenes’application in solar cells.It is believed that this review can provide a comprehensive and deep understanding into the research status and,moreover,helps widen a new situation for the study of MXenes in photovoltaics.

关键词： Ti3C2Tx MXene solar cells Additives Hole/electron transport layers Electrodes

Strain in perovskite solar cells: origins, impacts and regulation

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National Science Review 2021年第8期8卷 39-56页

作者： Jinpeng Wu Shun-Chang Liu Zongbao Li Shuo Wang Ding-Jiang Xue Yuan Lin Jin-Song Hu Beijing National Laboratory for Molecular Sciences(BNLMS) Institute of ChemistryChinese Academy of Sciences School of Chemical Sciences University of Chinese Academy of Sciences School of Material and Chemical Engineering Tongren University

Metal halide perovskite solar cells(PSCs) have seen an extremely rapid rise in power conversion efficiencies in the past few years. However, the commercialization of this class of emerging materials still faces serious challenges, one of which is the instability against external stimuli such as moisture, heat and irradiation.Much focus has deservedly been placed on understanding the different origins of intrinsic instability and thereby enhancing their stability. Among these, tensile strain in perovskite films is an important source of instability that cannot be overcome using conventionally extrinsic stabilization approaches such as encapsulation. Here we review recent progress in the understanding of the origin of strain in perovskites as well as its corresponding characterization methods, and their impacts on the physical properties of perovskites and the performance of PSCs including efficiency and stability. We then summarize the latest advances in strain-regulation strategies that improve the intrinsic stability of perovskites and photovoltaic devices. Finally, we provide a perspective on how to make further progress in stable and high-efficiency PSCs via strain engineering.

关键词： perovskite stress strain stability solar cells