Journal
ORGANIC ELECTRONICS
Volume 77, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.orgel.2019.105406
Keywords
TiO2; Electron transport layer; Perovskite solar cell; Photovoltaic; Sub-module; Hysteresis behavior
Funding
- Ministry of Science and Technology, Taiwan [MOST 108-2628-E-182-003-MY3, MOST 106-2221-E-182057-MY3]
- Chang Gung University [QZRPD181]
- Chang Gung Memorial Hospital, Linkou [CMRPD2G0302, BMRPF67, BMRPC74]
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This study demonstrates the effect of electron collection and transportation for TiO2 electron transport layer (ETL) of the mesoscopic perovskite solar cells (PSCs). The influence of compact TiO2 layer (c-TiO2) with various spray cycles, the particle size effect of mesoporous TiO2 (meso-TiO2) film and post-treatment of TiO2 electrode for perovskite solar cells have been studied systematically. We further optimize the meso-TiO2 thickness to enhance the electron collection and transport efficiency and to reduce the anomalous J-V hysteresis phenomenon of PSCs. After adjusting the fabrication process of TiO2 ETL, the highest performance of small cell PSC shows the power conversion efficiency (PCE) of 19.39% in the reverse scan and 19.12% in the forward scan, respectively. A sub-module PSC within an active area of 11.7 cm(2) exhibits impressive PCE of 16.03% under the illumination of 100 mW/cm(2) (AM1.5G). Moreover, it also shows an outstanding PCE of 25.49% under the illumination of 6000 lx of T5 indoor light source.
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