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Surface passivation and hole extraction:Bifunctional interfacial engineering toward high-performance all-inorganic CsPbIBr2 perovskite solar cells with efficiency exceeding 12%

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Journal of Energy Chemistry 2022年第11期31卷 387-393,I0011页

作者： Qi Liu Junming Qiu Xianchang Yan Yuemeng Fei Yue Qiang Qingyan Chang Yi Wei Xiaoliang Zhang Wenming Tian Shengye Jin Ze Yu Licheng Sun State Key Laboratory of Fine Chemicals Dalian University of Technology(DUT)Dalian 116024LiaoningChina School of Materials Science and Engineering Beihang UniversityBeijing 100191China State Key Laboratory of Molecular Reaction Dynamics and the Dynamic Research Center for Energy and Environmental Materials Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina Key Laboratory of Materials Modification by Laser Ionand Electron Beams(Ministry of Education)Dalian University of Technology(DUT)Dalian 116024LiaoningChina Center of Artificial Photosynthesis for Solar Fuels School of ScienceWestlake UniversityHangzhou 310024ZhejiangChina Department of Chemistry School of Engineering Sciences in ChemistryBiotechnology and HealthKTH Royal Institute of Technology10044 StockholmSweden

All-inorganic CsPbIBr2perovskite solar cells(PSCs)have attracted considerable research attention in recent years due to their excellent thermal ***,their power conversion efficiencies(PCEs)are relatively low and still far below the theoretical ***,we report the use of an organic dye molecule(namely VG1-C8)as a bifunctional interlayer between perovskite and the hole-transport layer in *** experimental and theoretical calculation results disclose that the multiple Lewis base sites in VG1-C8 can effectively passivate the trap states on the perovskite ***,theπ-conjugated dye molecule significantly accelerates the hole extraction from the perovskite absorber as evidenced by the photoluminescence ***,the VG1-C8 treatment simultaneously boosts the photovoltage and photocurrent density values from 1.26 V and 10.80 mA cm^(-2) to 1.31 V and 12.44 m A cm^(-2),*** leads to a significant enhancement of PCE from 9.20%to12.10%under one sun irradiation(AM 1.5G).To our knowledge,this is the record efficiency reported so far for CsPbIBr_(2) ***,the present work demonstrates an effective interfacial passivation strategy for the development of highly efficient PSCs.

关键词： All-inorganic perovskite solar cells CsPbIBr2 Defect passivation hole extraction High efficiency

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Surface-Modified Graphene Oxide/Lead Sulfide Hybrid Film-Forming Ink for High-Efficiency Bulk Nano-Heterojunction Colloidal Quantum Dot Solar Cells

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Nano-Micro Letters 2020年第9期12卷 56-69页

作者： Yaohong Zhang Guohua Wu Chao Ding Feng Liu Dong Liu Taizo Masuda Kenji Yoshino Shuzi Hayase Ruixiang Wang Qing Shen Faculty of Informatics and Engineering The University of Electro-CommunicationsTokyo 182-8585Japan School of Materials Science and Engineering Shaanxi Normal UniversityXi’an 710119People’s Republic of China X-Frontier Division Toyota Motor CorporationShizuoka 471-8571Japan Department of Electrical and Electronic Engineering University of MiyazakiMiyazaki 889-2192Japan Beijing Engineering Research Centre of Sustainable Energy and Buildings Beijing University of CivilEngineering and ArchitectureBeijing 102616People’s Republic of China

Solution-processed colloidal quantum dot solar cells(CQDSCs) is a promising candidate for new generation solar *** obtain stable and high performance lead sulfide(PbS)-based CQDSCs,high carrier mobility and low non-radiative recombination center density in the PbS CQDs active layer are *** order to effectively improve the carrier mobility in PbS CQDs layer of CQDSCs,butylamine(BTA)-modified graphene oxide(BTA@GO) is first utilized in PbS-PbX2(X=I-,Br-) CQDs ink to deposit the active layer of CQDSCs through one-step spin-coating *** surface treatment of GO dramatically upholds the intrinsic superior hole transfer peculiarity of GO and attenuates the hydrophilicity of GO in order to allow for its good dispersibility in ink *** introduction of B TA@GO in CQDs layer can build up a bulk nano-heterojunction architecture,which provides a smooth charge carrier transport channel in turn improves the carrier mobility and conductivity,extends the carriers lifetime and reduces the trap density of PbS-PbX2 CQDs ***,the BTA@GO/PbS-PbX2 hybrid CQDs film-based relatively large-area(0.35 cm2) CQDSCs shows a champion power conversion efficiency of 11.7% which is increased by 23.1% compared with the control device.

关键词： Quantum dot solar cells PbS colloidal quantum dots hole extraction Graphene oxide Surface modified

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Revealing the Role of Elementary Doping in Photocatalytic Phenol Mineralization

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Chinese Journal of Structural Chemistry 2022年第9期41卷 69-73页

作者： Houkui Xiang Zhijian Wang Jiazang Chen State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBejing 100049China

Photocatalytic mineralization of recalcitrant contaminants like phenol in wastewater requires abundant hydroxyl radicals(·OH) to initiate the reaction prior to the ring-opening. We here increase the free energy for adsorption of O~* species on TiOsurface and slightly downshift the band position by tin doping. This can simultaneously promote the generation and suppress the annihilation of ·OH. Besides, tin doping can also facilitate semiconductor-cocatalyst-solution(SCS) interfacial electron transfer by lowering the potential barrier and synergistically enhance the photon utilization. By filming the photocatalyst onto our developed fixed bed reactors, the loss of photons resulting from undesirable absorption by contaminants can be alleviated. By these virtues, trace amount of phenol in wastewater can be efficiently mineralized.

关键词： hole extraction interfacial electron transfer hydroxyl radical elementary doping photocatalytic mineralization

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Anode interfacial modification for non-fullerene polymer solar cells:Recent advances and prospects

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InfoMat 2022年第12期4卷 33-73页

作者： Nafees Ahmad Guangxing Liang Ping Fan Huiqiong Zhou Shenzhen Key Laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and SystemsCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhenPeople's Republic of China CAS Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and TechnologyBeijingPeople's Republic of China

Recently,the power conversion efficiency(PCE)of single-junction non-fullerene polymer solar cells(NF-PSCs)has surpassed 19%due to the fast development of novel donor polymers,NF-acceptors,device engineering,and interlayer *** anode interlayer(AIL)plays a vital role in improving the efficiency and stability of *** challenges and opportunities in this research area encourage researchers to pursue great innovation in developing new materials and strategies for highly efficient *** review summarizes the recent development of AIL materials and their modification strategies in single-junction ***,a brief introduction,key functions,basic requirements,and peculiar features of AILs when employed in NF-PSCs are ***,the impact of AIL materials(including organic,inorganic,and hybrid materials)on the PCE and the stability of NF-PSCs are ***,the fabrication of large-area devices and related issues are *** summary and the future challenges regarding efficient AIL are summarized in the last section of this review.

关键词： anode interlayer efficiency hole extraction non-fullerene polymer solar cells stability

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Chemical Linkage and Passivation at Buried Interface for Thermally Stable Inverted Perovskite Solar Cells with Efficiency over 22%

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CCS Chemistry 2023年第8期5卷 1802-1814页

作者： Ying Tan Xueqing Chang Jun-Xing Zhong Wenhuai Feng Meifang Yang Tian Tian Li Gong Wu-Qiang Wu MOE Key Laboratory of Bioinorganic and Synthetic Chemistry Lehn Institute of Functional MaterialsSchool of ChemistrySun Yat-sen UniversityGuangzhou 510006 Instrumental Analysis Research Center Sun Yat-sen UniversityGuangzhou 510275

Poly[bis(4-phenyl)-(2,4,6-trimethylphenyl)amine](PTAA)has been developed as one of the most popular hole transport layer(HTL)materials in inverted perovskite solar cells(PSCs).However,the efficiency,thermal stability,and reproducibility of PTAA-based devices are still largely limited by underoptimized chemical interaction,energy level alignment,and contact affinity at the PTAA/perovskite *** this end,we introduced a bilateral chemical linker to simultaneously achieve favorable chemical interaction with the PTAA underlayer and form robust coordination bonding with the buried perovskite bottom layer,which beneficially improved the contact affinity,facilitated the hole extraction,well-passivated the interfacial defects,and relieved the nonradiative charge recombination at the HTL/perovskite buried *** inverted PSCs modified with interfacial chemical linker exhibited consistently higher power conversion efficiencies and performance reproducibility than that of the PTAA-only *** with the blade-coated FA0.4MA0.6PbI3 perovskite layer,a champion efficiency of 22.23%has been achieved,which is one of the highest reported values for the inverted PSCs based on the bilayer *** targeted device showed enhanced thermal stability under continuous heating at 85℃ owing to suppressed composition segregation with robust interfacial linkage and *** work offers a new insight towards making efficient,thermally stable,and reproducible perovskite photovoltaics.

关键词： perovskite solar cells hole extraction charge recombination defect passivation thermal stability

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Insight into the CH3NH3PbI3/C interface in hole-conductor-free mesoscopic perovskite solar cells

Insight into the CH3NH3PbI3/C interface in hole-conductor-fr...

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第三届新型太阳能电池学术研讨会

作者： Jiangwei Li Guangda Niu Wenzhe Li Kun Cao Mingkui Wang Liduo Wang Department of Chemistry Tsinghua University Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology

Perovskite solar cells(PSCs) with hole-conductor-free mesoscopic architecture have shown superb stability and great potential in practical *** printable carbon counter electrodes take full responsibility of extracting holes from the active CHNHPbI ***,an in depth study of the CHNHPbI/C interface properties,such as the structural formation process and the effect of interfacial condition on hole extraction,is still ***,we present,for the first time,an insight of the spatial confinement induced CHNHPb I/C interface formation by in-situ photoluminescence observation during the crystallization process of CH3NH3 Pb *** derived reaction kinetics allows to a quantitative description of the perovskite formation *** addition,we found the interfacial contact between carbon and perovskite to be dominant for hole extraction efficiency,being associated with the photovoltaic parameter of short circuit current density(JSC).Consequently,we conducted a solvent vapor assisted process of PbI diffusion to carefully control the CHNHPbI/C interface with less unreacted PbI *** improvement of interface condition therefore contributes to a high hole extraction proved by charge extraction resistance and PL lifetime change,resulting in the increased J.

关键词： interface hole extraction carbon counter electrode perovskite solar cell solvent vapor treatment

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