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Improvement in Performance of carbon-based perovskite solar cells through Interface Modification with CTAC

陶瓷学报 2024年第6期45卷 1136-1144页

作者： SHEN Siming TIAN Chuanjin JU Zhiyang ZHU Liangping JIANG Wenying WANG Chang'an XIE Zhipeng ZHAO Wenyan School of Materials Science and Engineering Jingdezhen Ceramic UniversityJingdezhen 333403JiangxiChina National Engineering Research Center for Domestic&Building Ceramics Jingdezhen Ceramic UniversityJingdezhen 333001JiangxiChina State Key Laboratory of New ceramics&Fine Processing School of Materials and EngineeringTsinghua UniversityBeijing 100084China

carbon-based perovskite solar cells have attracted much attention,due to their low cost,simple preparation process and high chemical ***,the devices exhibit low photoelectric conversion efficiency,owing to the presence of defects and interface impedance between the perovskite active layer and the contact *** order to minimize the interfacial defects and improve the charge transfer performance between the perovskite layer and the contact interface,cetyltrimethylammonium chloride(CTAC)was introduced into the lower interface of HTL-free carbon-based perovskite solar cells,because CTAC can be used as interface modification material to passivate the buried interface of perovskite and promote grain *** was found that CTAC can not only passivate the interface defects of perovskite,but also improve the crystalline quality of *** a result,the photovoltaic conversion efficiency of reaches 17.18%,which is 12.5%higher than that of the control *** 20 days in air with 60%RH humidity,the cell can still maintain more than 90%of the initial efficiency,which provides a new strategy for interfacial passivation of perovskite solar cells.

关键词： carbon-based perovskite solar cells hole transport layer-free interface modification photovoltaic conversion efficiency stability

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Synergistic Effect of Non-stoichiometry and Sb-doping on Air-stable α-CsPbI3 for Efficient carbon-based perovskite solar cells

Synergistic Effect of Non-stoichiometry and Sb-doping on Air...

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第五届新型太阳能电池学术研讨会

作者： Sisi Xiang Weiping Li Ya Wei Jiaming Liu Huicong Liu Liqun Zhu Haining Chen School of Materials Science and Engineering Beihang University

α-CsPbI with the most suitable band gap for all-inorganic perovskite solar cell(PSC)application faces an issue of phase instability at low temperature in air atmosphere. Herein,through stoichiometric investigation, α-CsPbI is successfully obtained with excess CsI at 110 ℃ in air atmosphere. By doping the α-CsPbI with Sb, phase stability is further enhanced and film morphology is also improved. carbon-based perovskite solar cells(C-PSCs) based on CsPbSbI achieve a promising power conversion efficiency(PCE)of 5.18%, a record value for α-CsPbI-based PSCs without hole transport ***, the CsPbSbIC-PSCs retains 93% of the initial PCE after 37 days storage in air atmosphere. Therefore, the synergistic effect of non-stoichiometry and Sb-doping presents a promising strategy to design all-inorganic lead halide PSCs with high performance and stability.

关键词： Non-stoichiometry Sb-doping Air-stable CsPbI3 carbon-based perovskite solar cells

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Highly efficient and durable planar carbon-based perovskite solar cells enabled by polystyrene modified hole-transporting layers

Highly efficient and durable planar carbon-based perovskite ...

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第十一届新型太阳能材料科学与技术学术研讨会

作者： Huiyin Zhang Yaoyao Song Yunzhao Sun Shixian Huang Yang Cao School of Instrument Science and Opto-Electronics Engineering Beijing Information Science & Technology University

The efficiency and durability of perovskite solar cells(PSCs) are closely related to the property and stability of each functional layer involved in *** to the excellent hole transport properties,the additive-doped Spiro-OMeTAD has become an excellent holetransporting material for obtaining highly efficient ***,the hygroscopic nature of additives and the pinholes caused by poor film-forming capability inevitably impair the performance and long-term stability of Spiro-OMeTAD and the resulting *** this study,the hydrophobic polymer polystyrene(PS) was incorporated to improve the hydrophobicity and film-forming capability of the additive-doped Spiro-OMeTAD *** on the PSmodified Spiro-OMeTAD and carbon electrodes,the derived planar carbon-based PSCs exhibited significantly enhanced long-term stability,which can maintain 92% of its initial efficiency after aging for 2500h under ambient atmosphere without *** addition,the PS-modified Spiro-OMeTAD exhibited improved morphology with reduced pinholes,contributing to significantly enhanced interfacial carrier ***,a champion power conversion efficiency of 21.06% was obtained,which is one of the highest efficiencies reported for the planar carbon-based PSCs to date.

关键词： Hole-transporting materials Stability Polystyrene Hydrophobicity carbon-based perovskite solar cells

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Interfacial charge transfer management for high-performance carbonbased perovskite solar cells

Interfacial charge transfer management for high-performance ...

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第九届新型太阳能材料科学与技术学术研讨会

作者： Yu Zou Wenjin Yu Lixin Xiao School of Physic Peking University

For perovskite solar cells with carbon electrodes(CPSCs) prepared using undoped hole transport materials and commercial carbon pastes, the poor interfacial carrier transport performance hinders the efficiency improvement. Herein, the use of additive 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane(F4 TCNQ) not only plays the role of passivating defects and assisting film formation but also regulates one to obtain more favorable interfacial energy band bending and energy level matching, while forming charge transfer complexes with perovskites due to its strong electron-withdrawing ability. Having all these functions at the same time makes CPSCs with F4 TCNQ addition obtain high quality, low defect density films with suppressed non-radiative recombination, along with extremely fast carrier separation and extraction capabilities. Together with the optimization of the electron transport layer with [6,6]-Phenyl-C61-butyric acid methyl ester(PCBM), the prepared CPSCs obtained an enhanced power conversion efficiency of 15.1% and a high VOC of 1.07 V with long stability.

关键词： Interfacial charge transfer carbon-based perovskite solar cells multi-functional additive F4TCNQ PCBM

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新型高效碳基钙钛矿太阳能电池（英文）

新型高效碳基钙钛矿太阳能电池（英文）

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第二届全国太阳能电池材料与器件大会

作者：王宇迪史彦涛 State Key Laboratory of Fine Chemicals Dalian University of Technology

perovskite solar cells(PSCs) as a representative of 3rd is at the frontier towards commercialization, which however is being hindered by the issues of long-term durability and fabrication cost that are both associated with the use of Ag/Au electrode. Among various PSC architectures developed so far, carbon-based PSCs(C-PSCs) demonstrate the best stability and the lowest cost. Whereas, despite numerous efforts, the power conversion efficiency(PCE) of carbon-based perovskite solar cells(C-PSCs) is still lag far behind the normal Ag/Au-electrode-based PSCs, which is mainly because of the huge energy loss caused by sluggish charge transfer kinetics occurring in carbon electrode and its related interfaces. Herein, by combination of an advanced cell architecture(modular C-PSCs, MC-PSCs), we report a strategy of dual interface coupling to well tune the charge transfer kinetics regarding hole transport layer(HTL) itself and the interface between HTL and carbon electrode. based on this strategy, high PCEs up to 22.07%(with a certified PCE of 21.9%, a record for C-PSCs to date) and excellent operational stability under persistent light irradiation have been achieved.

关键词： carbon-based perovskite solar cells highly efficient stability modular cell architecture

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