期刊
ACS NANO
卷 8, 期 2, 页码 1674-1680出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn406020d
关键词
perovskite solar cells; low temperature; planar structure; flexible solar cells
类别
资金
- Air Force Office of Scientific Research (AFOSR) [FA9550-09-1-0610]
- National Science Foundation [NSF ECCS-1202231]
- UCLA internal funds
- Directorate For Engineering [1202231] Funding Source: National Science Foundation
- Div Of Electrical, Commun & Cyber Sys [1202231] Funding Source: National Science Foundation
Perovskite compounds have attracted recently great attention in photovoltaic research. The devices are typically fabricated using condensed or mesoporous TiO2 as the electron transport layer and 2,2'7,7'-tetrakis-(N,N-dip-methoxyphenylamine)9,9'-spirobifluorene as the hole transport layer. However, the high-temperature processing (450 degrees C) requirement of the TiO2 layer could hinder the widespread adoption of the technology. In this report, we adopted a low-temperature processing technique to attain high-efficiency devices in both rigid and flexible substrates, using device structure substrate/ITO/PEDOT:PSS/CH(3)NH(3)Pbl(3-x)Cl(x)/PCBM/Al, where PEDOT:PSS and PCBM are used as hole and electron transport layers, respectively. Mixed halide perovskite, CH(3)NH(3)Pbl(3-x)Cl(x) was used due to its long carrier lifetime and good electrical properties. All of these layers are solution-processed under 120 degrees C. Based on the proposed device structure, power conversion efficiency (PCE) of 11.5% is obtained in rigid substrates (glass/ITO), and a 9.2% PCE is achieved for a polyethylene terephthalate/ITO flexible substrate.
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