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8.2%-Efficiency hydrothermal Sb_(2)S_(3) thin film solar cells by two-step RTP annealing strategy

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Science China Materials 2024年第11期67卷 3666-3674页

作者： Hui Deng Xinxin Feng Qiqiang Zhu Yonghao Liu Guidong Wang Caixia Zhang Qiao Zheng Jionghua Wu Weihuang Wang Shuying Cheng College of Physics and Information Engineering Institute of Micro-Nano Devices and Solar CellsFuzhou UniversityFuzhou 350108China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering Changzhou 213164China

Antimony sulfide(Sb_(2)S_(3))solar cells fabricated via hydrothermal deposition have attracted widespread *** annealing crystallization process plays a crucial role in achieving optimal crystallinity in hydrothermal Sb_(2)S_(3)thin ***,incomplete crystallization and the loss of sulfur at high-temperature contribute to defect recombination,constraining device ***,a twostep rapid thermal processing(RTP)annealing strategy is proposed to improve the crystal quality and efficiency of Sb_(2)S_(3)solar *** annealing process in Ar protection with atmospheric pressure can suppress S loss caused by saturated vapor *** two-step RTP annealing with the 330℃ low-temperature and 370℃ high-temperature process ensures high crystallinity and vertical orientations of Sb_(2)S_(3)thin films,accompanied by a reduction in defect concentration from 1.01×10^(12)to 5.97×10^(11)cm^(-3).The Sb_(2)S_(3)solar cell achieves an efficiency of 8.20%with an enhanced open circuit voltage(VOC)of 784 *** build-in voltage(Vbi)of 1.17 V and irradiation-dependent ideal factor(n)of 1.48 demonstrate enhanced heterojunction quality and suppressed defect recombination in the *** presented two-step annealing strategy and physical mechanism study will open new prospects for high-performance Sb_(2)S_(3)solar cells.

关键词： Sb_(2)S_(3) solar cells hydrothermal two-step annealing defect passivation

Large improvement of photovoltaic performance of flexible perovskite solar cells using a multifunctional phospho-ethanolamine-modified SnO_(2)layer

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Science China Materials 2022年第12期65卷 3392-3401页

作者： Zijun Yi Xin Li Bo Xiao Yubo Luo Qinghui Jiang Junyou Yang State Key Laboratory of Material Processing and Die&Mould Technology Huazhong University of Science and TechnologyWuhan 430074China Solar Energy Research Institute of Singapore National University of SingaporeSingapore 117574Singapore

The non-radiative recombination loss caused by diverse defects within SnO_(2)electron transport layer(ETL),perovskite film,and their interface greatly hinders the further improvement of the performance and stability of flexible perovskite solar cells(PSCs).Therefore,it is urgent to develop an effective strategy to address these ***,a multifunctional material,phospho-ethanolamine(PE),is introduced into SnO_(2)aqueous colloids to suppress defects and prepare high-quality *** results demonstrate that the incorporation of PE can significantly reduce the number of Sn dangling bonds due to the formation of new Sn–O–P bonds,which is beneficial to ameliorating the electrical properties of SnO_(2)and obtaining dense SnO_(2)***,the amino group(NH_(2))of PE can interact with uncoordinated Pb^(2+)in perovskite,thereby suppressing SnO_(2)/perovskite interface defects and obtaining improved perovskite film ***,the optimized flexible and rigid PSCs based on the SnO_(2)-PE composite ETL yield outstanding photoelectric conversion efficiency(PCE)of 18.48%and 21.61%,***,flexible PSCs based on SnO_(2)-PE present excellent mechanical durability,and 90.6%of the original PCE is retained after 1000 bending cycles.

关键词： perovskite solar cells tin dioxide flexible electronic properties defect passivation

通过5-氨基-4-甲酰基咪唑盐酸盐提高可印刷介观钙钛矿太阳能电池的光伏性能

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Science China Materials 2023年第12期66卷 4622-4629页

作者：郭荣荣张声建陈怡文王栋杰吴晨术王陇博陶莹朱稳定张浩华陈长青熊健张哲泠黄瑜张坚 Engineering Research Center of Electronic Information Materials and Devices(Ministry of Education) Guangxi Key Laboratory of Information MaterialsSchool of Materials Science and EngineeringGuilin University of Electronic TechnologyGuilin 541004China

基于m-TiO_(2)/m-ZrO_(2)/C的无空穴可印刷介观钙钛矿太阳能电池(p-MPSCs)具有成本低廉、操作简便和稳定性优异的特点,被认为是最具商业应用潜力的新型光伏器件之一.然而,与传统PSC相比,p-MPSCs的开路电压(VOC)损失较大,导致能量转换效... 详细信息

基于m-TiO_(2)/m-ZrO_(2)/C的无空穴可印刷介观钙钛矿太阳能电池(p-MPSCs)具有成本低廉、操作简便和稳定性优异的特点,被认为是最具商业应用潜力的新型光伏器件之一.然而,与传统PSC相比,p-MPSCs的开路电压(VOC)损失较大,导致能量转换效率(PCE)与传统PSC存在差距.在此,我们提出了一种利用5-氨基-4甲酰胺咪唑盐酸盐(AICA)提升p-MPSCs开路电压的方法.AICA不仅可以调节钙钛矿膜的功函数,其酰胺基团和氨基还能分别钝化钙钛矿中未配位的Pb2+和I−缺陷,稳定钙钛矿的结构,形成高质量钙钛矿薄膜,从而抑制缺陷诱导的非辐射复合.因此,引入AICA后p-MPSCs获得了16.68%的PCE,并且VOC从0.88提升至0.98 V.

关键词： mesoscopic perovskite solar cells additives opencircuit voltage defect passivation

Effect of potassium iodide on film quality and photovoltaic performance of perovskite solar cells fabricated via the two-step method

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Effect of potassium iodide on film quality and photovoltaic ...

第八届新型太阳能材料科学与技术学术研讨会

作者： GAO Lingwei REN Jintao CHEN Qing YUN Zhengkuan WU Zhixin GAO Yiwei WANG Beiheng ZHAI Guangmei Key Laboratory of Interface Science and Engineering in Advanced Materials Taiyuan University of TechnologyMinistry of Education

In this work, we added different amounts(0, 0.001, 0.005, and 0.010 mol/L) of potassium iodide(KI) into the PbI/PbBr precursor solution dissolved in dimethylformamide and dimethyl sulfoxide solvent mixture to fabricate(MA)(FA)PbBr I perovskite films and solar cells(referred to as KI-0, KI-1, KI-5 and KI-10 films/devices) via the two-step method. The effects of KI on lead halide precursor, perovskite transformation, defect density and cell performance were investigated. Our results show that the introduction of appropriate amount of KI into the lead halide solution is conducive to the formation of iodide-rich iodoplumbates, which is beneficial to improving the crystallinity of lead halide and perovskite films and accelerating the transformation from lead halide to perovskite. When 0.005 mol/L of KI was added into the lead halide precursor, the defect density of the KI-5 film was reduced to 7.5×10 cm from 8.7×10 cm for the KI-0 film. Moreover, the photoelectric conversion efficiency was increased from 17.49% for the KI-0 device to 19.17% for the KI-5 device.

关键词： Perovskite solar cells Potassium iodide "Two-step" deposition defect passivation Iodoplumbates

Thermal-Triggered Self-Healing Strategies for High-Efficiency and Stable Perovskite Solar Cells

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Thermal-Triggered Self-Healing Strategies for High-Efficienc...

第九届新型太阳能材料科学与技术学术研讨会

作者： Jialong Duan Qiyao Guo Qiaoyu Zhang Junshuai Zhang Qunwei Tang Institute of New Energy Technology College of Information Science and TechnologyJinan University

Recently, great efforts have been conducted on enhancing the efficiency and stability of perovskite solar cells(PSCs). However, during the following operation, detrimental defects will be inevitably formed under harsh conditions, such as humidity, heat, light, etc. Therefore, how to construct a dynamic strategy to self-heal these in-service formed defects is important. To address this issue, thermal-sensitive materials, including polyurethane(PU) and bromonaphthalene, have been employed to self-heal the defective surface or grain boundaries. Arsing from the dynamic covalent disulfide bonds between adjacent molecule chains in PU and solid-to-liquid phase conversion at high temperatures, the defects are effectively passivated, leading to the enhanced efficiency and prolonged stability.

关键词： Perovskite solar cells Self-healing interface Solid-to-liquid conversion Charge recombination defect passivation

Omnibearing Interpretation of Rubidium-Based Perovskite Recipes towards Electronic passivation and Ion Diffusion Mitigation

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Omnibearing Interpretation of Rubidium-Based Perovskite Reci...

第八届新型太阳能材料科学与技术学术研讨会

作者： Chenzhe Xu Wenqiang Fan Suicai Zhang Shuangfei Ma Zhuo Kang Yue Zhang Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for Advanced Energy Materials and TechnologiesUniversity of Science and Technology Beijing State Key Laboratory for Advanced Metals and Materials School of Materials Science and EngineeringUniversity of Science and Technology Beijing

Rubidium cation(Rb+) doping has been witnessed to play a significant role in boosting comprehensive performances of organic-inorganic hybrid perovskite(OIHP) based photovoltaic devices. However, microscopic understanding of Rb+ doping, especially for its location-dependent function and related mechanism still remains ambiguous, thus heavily hindering its further development. Herein, grain boundary included atomic models, for the first time, have been adopted for accurate DFT analysis of the practical Rb+ distribution in perovskites. Assisted with the synchrotron-based grazing incidence X-ray diffraction technique, the spatial distribution of Rb+ covering both grain interiors and grain boundaries have been thoroughly identified. On this basis, on the one hand, the drastic elevation of halogen vacancy formation energy together with superior electronic passivation effect induced by Rb+ dopants in grain interior has been highlighted, which can be attributed to the reduced host tolerance factor and relaxed lattice strain. On the other hand, as evidenced by the blocked microcurrent at grain boundaries and increased energy barrier, the critical role of Rb+ dopants in inhibiting ion migration and suppressing phase segregation has been further investigated. Hence, such omnibearing decipherment about the origin of Rb+ doping superiorities is believed to shed new light on the advancement of high-efficiency cascade doping strategies as well as perovskite compositional engineering.

关键词： Perovskite solar cells Grain boundary defect passivation Ion migration

Improved the Performance of Quantum Dot Solar Cells through Employing Zinc Oxide:Polyethylenimine Nanocomposites as Tunable Electron Transport Layer

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Improved the Performance of Quantum Dot Solar Cells through ...

第四届新型太阳能电池学术研讨会

作者： Lei Wang Xintong Zhang Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education Northeast Normal University

Colloidal quantum dot solar cells(CQDSCs) have significantly progressed their power conversion efficiencies(PCEs) as a result of recent developments in their device architecture and interfacial ***, Surface passivation of Pb S colloidal quantum dots(CQDs) or appropriate interlayers between CQDs and electron transporting layers(ETLs) has been used in highly efficient solar cells. Moreover, electronic extraction conventionally need to pass through the ETLs to the transparent electrode;thus, the properties of the ETLs identically influence the device ***, We employed polyethylenimine(PEI) doped sol-gel-processed zinc oxide composites(ZnO:PEI) as efficient ETL to improve the PCE of *** promotion of device performance is attribution of defect reduction of ZnO and energy band optimization.

关键词： quantum dot ZnO:PEI defect passivation

The efficient and stable inverted perovskite solar cells based on sym metrical quaternary ammonium salt modification

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The efficient and stable inverted perovskite solar cells bas...

第八届新型太阳能材料科学与技术学术研讨会

作者： Weizhi liu Zhongjun Dai Naihe Liu Junqian Dai Jian Xiong Guilin University Of Electronic Technology

defects and interface recombination loss of the inverted perovskite solar cells(PSCs) are seriously impact on its performance and stability. Here, a kind of Symmetrical quaternary ammonium salt(SQAS) was introduced into inverted PSCs to overcome these challenges. We comprehensively studied the impact of SQAS on the physical properties of perovskite films and the performance of PSCs. The defects passivation, enhanced built-in electric field of the devices as well as enhanced hydrophobicity of perovskite film are confirmed by the SQAS assembled on the surface of the film. The highest power conversion efficiency(PCE) reached 20.36%, which is one of highest PCE in the inverted PSCs based on MAPbI/PCBM plane heterojunction. Meanwhile the stability of the device also enhanced. This work proposes an efficient way by addressing the trap states, non-ideal interface and hydrophilicity of the perovskite films issues to improve the performance and stability of the PSCs.

关键词： Inverted perovskite solar cells Interface recombination loss defect passivation stability

Efficiency enhancement to 24.62%in inverted perovskite solar cells through poly(ionic liquid)bulk modification

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Energy Materials and Devices

Energy Materials and Devices 2024年第1期2卷 64-75页

作者： Xingyuan Chen Tong Wang Jiabao Yang Xingyu Pu Hui Chen Bingxiu Xue Long Jiang Jianbo Yin Qi Cao Xuanhua Li State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and Engi-neeringNorthwestern Polytechnical UniversityXi’an 710072China Research&Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518057China Smart Materials Laboratory Department of Applied PhysicsSchool of Physical Science and TechnologyNorthwestern Polytechnical UniversityXi’an 710072China State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials CNPC Tubular Goods Research InstituteXi’an 710077China

Small-molecule ionic liquids(ILs)are frequently employed as efficient bulk phase modifiers for perovskite ***,their inherent characteristics,such as high volatility and ion migration properties,pose challenges in addressing the stability issues associated with perovskite solar cells(PSCs).In this study,we design a poly(IL)with multiple active sites,named poly[4-styrenesulfonyl(trifluoromethylsulfonyl)imide]pyri-dine(P[STFSI][PPyri]),as an efficient additive of perovskite *** S=O in the sulfonyl group chelates with uncoordinated Pb^(2+)and forms hydrogen bonds with the organic cations in the perovskite,suppressing the volatilization of the organic *** N+in pyridine can fix halide ions through electrostatic interaction with I-and Br-ions to prevent halide ion migration.P[STFSI][PPyri]demonstrates the ability to passivate defects and suppress nonradiative recombination in ***,it facilitates the fixation of organic and halide ions,thereby enhancing the device’s stability and photoelectric ***,the introduction of P[STFSI][PPyri]as a dopant in the devices resulted in an excellent efficiency of 24.62%,demonstrating outstanding long-term operational stability,with the encapsulated device maintaining 87.6%of its initial effi-ciency even after 1500 h of continuous maximum power point *** strategy highlights the promising potential of poly(IL)as an effective additive for PSCs,providing a combination of high performance and stabil-ity.

关键词： inverted perovskite solar cells bulk modification defect passivation