|
|||||
|
|
Dual-Interface Engineering in Perovskite Solar Cells with 2D Carbides |
|
| Authors: | Jiandong He Guilin Hu Yuanyuan Jiang Siyuan Zeng Guosheng Niu Guitao Feng Zhe Liu Kaiyi Yang Cong Shao Yao Zhao Prof Fuyi Wang Prof Yongjun Li Prof Jizheng Wang |
| Institution: | 1. Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 China
University of Chinese Academy of Sciences, Beijing, 100049 China;2. University of Chinese Academy of Sciences, Beijing, 100049 China;3. Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 China;4. Beijing National Laboratory for Molecular Sciences, National Centre for Mass Spectrometry in Beijing, CAS Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 China;5. University of Chinese Academy of Sciences, Beijing, 100049 China Beijing National Laboratory for Molecular Sciences, National Centre for Mass Spectrometry in Beijing, CAS Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 China |
| Abstract: | Passivating the interfaces between the perovskite and charge transport layers is crucial for enhancing the power conversion efficiency (PCE) and stability in perovskite solar cells (PSCs). Here we report a dual-interface engineering approach to improving the performance of FA0.85MA0.15Pb(I0.95Br0.05)3-based PSCs by incorporating Ti3C2Clx Nano-MXene and o-TB-GDY nanographdiyne (NanoGDY) into the electron transport layer (ETL)/perovskite and perovskite/ hole transport layer (HTL) interfaces, respectively. The dual-interface passivation simultaneously suppresses non-radiative recombination and promotes carrier extraction by forming the Pb?Cl chemical bond and strong coordination of π-electron conjugation with undercoordinated Pb defects. The resulting perovskite film has an ultralong carrier lifetime exceeding 10 μs and an enlarged crystal size exceeding 2.5 μm. A maximum PCE of 24.86 % is realized, with an open-circuit voltage of 1.20 V. Unencapsulated cells retain 92 % of their initial efficiency after 1464 hours in ambient air and 80 % after 1002 hours of thermal stability test at 85 °C. |
| Keywords: | Graphdiyne Interface MXenes Passivation Perovskite Solar Cells |