期刊
CHEMSUSCHEM
卷 12, 期 21, 页码 4824-4831出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201902165
关键词
conjugated polymers; electron-transporting layers; plastics; interface modification layers; TiO2 nanoparticles
资金
- National Natural Science Foundation of China [51573026, 21574021]
- Open Fund of the State Key Laboratory of Luminescent Materials and Devices (South China University of Technology) [2017-skllmd-11]
Interface engineering of TiO2 nanoparticles (NPs)-based perovskite solar cells (PVSCs) is often necessary to facilitate the extraction and transport of charge carriers. In this work, poly[{9,9-bis[3 '-(N,N-dimethyl)propyl]-2,7-fluorene}-alt-2,7-(9,9-dioctylfluorene)] (PFN) and polystyrene (PS) are demonstrated to be effective surface modifiers of the TiO2 NPs electron-transporting layer in n-i-p PVSCs. The low-cost insulating polymer PS performs better than the PFN conjugated polymer owing to its high film quality, low surface energy and insulating characteristics. A peak power conversion efficiency (PCE) of 15.09 % with an open-circuit voltage (V-OC) of 1.05 V and a PCE of 17.13 % with an ultrahigh V-OC of 1.18 V is achieved with TiO2 NPs/PS-based PVSCs using poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) and spiro-OMeTAD, respectively, as the hole-transporting material.
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