期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 11, 页码 12648-12655出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b18660
关键词
mesoporous TiO2; perovskite solar cell; low-temperature processed TiO2; oxygen plasma; flexible solar cell
资金
- South Korean National Research Foundation
- Ministry of Science, ICT, and Future Planning [2017R1A2B4011499, PNK6760]
- Korea Institute of Materials Science (KIMS)
- National Research Council of Science & Technology (NST), Republic of Korea [PNK6760] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A major problem in the application of mesoporous TiO2 as an electron transport layer for flexible perovskite solar cells is that a high-temperature sintering process is required to remove organic additives from the TiO2 layer. A facile oxygen plasma process is herein demonstrated to fabricate mesoporous-structured perovskite solar cells with significant photovoltaic performance at low temperatures. When the low-temperature processed TiO2 layer is modified via oxygen plasma, the organic additives in the TiO2 layer that hinder the charge transport process are successfully decomposed. The oxygen plasma treatment improves the wettability and infiltration of the perovskite layer and also passivates the oxygen vacancy related traps in TiO2. Hence, the oxygen plasma treatment evidently enhances charge extraction and transport, thereby improving photovoltaic performance and decreasing hysteresis.
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