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您的检索式：作者名="Michael Grätzel"
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| 1 | Double Layer Composite Electrode Strategy for Efficient Perovskite Solar Cells with Excellent Reverse-Bias Stability显示文摘Perovskite solar cells(PSCs)have become the represent-atives of next generation of photovoltaics;nevertheless,their stability is insufficient for large scale deployment,particularly the reverse bias stability.Here,we propose a transparent conducting oxide(TCO)and low-cost metal composite electrode to improve the stability of PSCs without sacrificing the efficiency.The TCO can block ion migrations and chemical reactions between the metal and perovskite,while the metal greatly enhances the conductivity of the composite electrode.As a result,composite electrode-PSCs achieved a power conversion efficiency(PCE)of 23.7%(certified 23.2%)and exhibited excellent stability,maintaining 95%of the initial PCE when applying a reverse bias of 4.0 V for 60 s and over 92%of the initial PCE after 1000 h continuous light soaking.This composite electrode strategy can be extended to different combinations of TCOs and metals.It opens a new avenue for improving the stability of PSCs. | Chaofan Jiang Junjie Zhou Hang Li Liguo Tan Minghao Li Wolfgang Tress Liming Ding Michael Grätzel Chenyi Yi | 2023 | Nano-Micro Letters2023，15，1： | 0 |
| 2 | Perovskite Solar Cells Yielding Reproducible Photovoltage of 1.20 V显示文摘High photovoltages and power conversion efciencies of perovskite solar cells(PSCs)can be realized by controlling the undesired nonradiative charge carrier recombination.Here,we introduce a judicious amount of guanidinium iodide into mixed-cation and mixed-halide perovskite flms to suppress the parasitic charge carrier recombination,which enabled the fabrication of>20%efcient and operationally stable PSCs yielding reproducible photovoltageas high as 1.20 V.By introducing guanidinium iodide into the perovskite precursor solution,the bandgap of the resulting absorber material changed minimally;however,the nonradiative recombination diminished considerably as revealed by time-resolved photoluminescence and electroluminescence studies.Furthermore,using capacitance-frequency measurements,we were able to correlate the hysteresis features exhibited by the PSCs with interfacial charge accumulation.Tis study opens up a path to realize new record efciencies for PSCs based on guanidinium iodide doped perovskite flms. | Essa A.Alharbi M.Ibrahim Dar Neha Arora Mohammad Hayal Alotaibi Yahya A.Alzhrani Pankaj Yadav Wolfgang Tress Ahmed Alyamani Abdulrahman Albadri Shaik M.Zakeeruddin Michael Grätzel | 2019 | Research2019，，1： | 4 |
| 3 | Suppressed recombination for monolithic inorganic perovskite/silicon tandem solar cells with an approximate efficiency of 23%显示文摘Potentially temperature-resistant inorganic perovskite/silicon tandem solar cells(TSCs)are promising devices for boosting efficiency past the single-junction silicon limit.However,undesirable non-radiative recombination generally leads to a significant voltage deficit.Here,we introduce an effective strategy using nickel iodide,an inorganic halide salt,to passivate iodine vacancies and suppress non-radiative recombination.NiI_(2)-treated CsPbI_(3-x)Br_(x) inor-ganic perovskite solar cells with a 1.80 eV bandgap exhibited an efficiency of 19.53%and a voltage of 1.36 V,corresponding to a voltage deficit of 0.44 V.Importantly,the treated device demonstrated excellent operational stability,maintaining 95.7%of its initial efficiency after maximum power point tracking for 300 h under continuous illumination in a N_(2) atmosphere.By combining this inorganic perovskite top cell with a narrower bandgap silicon bottom cell,we for the first time achieved monolithic inorganic perovskite/silicon TSCs,which exhibited an effi-ciency of 22.95%with an open-circuit voltage of 2.04 V.This work provides a promising strategy for using inorganic passivation materials to achieve efficient and stable solar cells. | Sanlong Wang Pengyang Wang Bingbing Chen Renjie Li Ningyu Ren Yucheng Li Biao Shi Qian Huang Ying Zhao Michael Grätzel Xiaodan Zhang | 2022 | eScience2022，2，3： | 1 |
| 4 | 基于铕掺杂的CsPbI2Br的高效稳定无机钙钛矿太阳能电池显示文摘文章简介根据2018年的认证,有机无机杂化钙钛矿太阳能电池的最新光电转换效率已达23.3%,成为可与硅电池媲美的新型太阳能电池。但钙钛矿中有机组分对热不稳定,虽然全无机钙钛矿(CsPbX3)可以从根本上解决该问题,但是低带隙全无机钙钛矿材料在室温下会从立方相(钙钛矿相)变成正交相(非钙钛矿相),从而失去光学活性。这种相不稳定性成为制约无机钙钛矿太阳能电池发展的瓶颈。 | 向万春 Zaiwei Wang Dominik JKubicki Wolfgang Tress Jingshan Luo Daniel Prochowicz Seckin Akin Lyndon Emsley Jiangtao Zhou Giovanni Dietler Michael Grätzel Anders Hagfeldt | 2020 | 科学新闻2020，，2： | 0 |
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