期刊
SOLAR ENERGY
卷 188, 期 -, 页码 239-246出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.solener.2019.06.016
关键词
Low-temperature process; Atomic layer deposition; Electron transport layer; Interfacial modifier; Planar structure; Perovskite solar cells
资金
- National Natural Science Foundation of China [61704128, 61874083]
- Fundamental Research Funds for the Central Universities [XJS191107, JB181408]
- Natural Science Foundation of Shaanxi, China [2017JM6049, 2018JQ6039]
- Class General Financial Grant from the China Postdoctoral Science Foundation [2016 M602771]
Perovskite solar cells (PSCs) have attracted increasing attentions for their outstanding efficiency and simple fabrication process. However, the commonly used typical titanium dioxide (TiO2) electron transport layer (ETL) requires a high-temperature treatment to crystallize. In this work, the low-temperature (150 degrees C) atomic layer deposition (ALD) processed TiO2 ETL, and the SnO2/PCBM double interfacial modifier have been adopted to fabricate the high performance PSCs of ITO/ALD-TiO2/SnO2/PC61BM/MA(0.7)FA(0.3)PbI((3-x))Cl((x))/Spiro-OMeTAD/Ag. The measurement results show that the PSCs with ALD-TiO2 ETL obtain the higher champion PCE of 19.45% than that of PSC with solution-TiO2 ETLs (PCE = 18.64%), along with the obviously enhanced FF and V-OC, as well as the better light stability and repeatability. And the transient photocurrent and photovoltage results demonstrate that the performance improvement origins from the enhanced charge transport and suppressed charge recombination. Therefore, the low-temperature ALD-TiO2 ETL with suitable modification is a promising strategy to fabricate efficient PSCs and flexible devices.
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