標題: | Cobalt Oxide (CoOx) as an Efficient Hole-Extracting Layer for High Performance Inverted Planar Perovskite Solar Cells |
作者: | Shalan, Ahmed Esmail Oshikiri, Tomoya Narra, Sudhakar Elshanawany, Mahmoud M. Ueno, Kosei Wu, Hui-Ping Nakamura, Keisuke Shi, Xu Diau, Eric Wei-Guang Misawa, Hiroaki 應用化學系 應用化學系分子科學碩博班 Department of Applied Chemistry Institute of Molecular science |
關鍵字: | cobalt oxide;hole-extraction layer;perovskite solar cell;photoluminescence;photovoltaic devices |
公開日期: | 14-十二月-2016 |
摘要: | CoOx is a promising hole-extracting layer (HEL) for inverted planar perovskite solar cells with device configuration ITO/CoOx/CH3NH3PbI3/PCBM/Ag. The devices fabricated according to a simple solution procedure showed the best photovoltaic performance attaining power conversion efficiency (PCE) of 14.5% under AM 1.5 G 1 sun irradiation, which is significantly superior to those of materials fabricated with a traditional HEL such as PEDOT:PSS (12.2%), NiOx (10.2%), and CuOx (9.4%) under the same experimental conditions. We characterized the chemical compositions with XPS, crystal structures with XRD, and film morphology with SEM/AFM techniques. Photoluminescence (PL) spectra and the corresponding PL decays for perovskite deposited on varied HEL films were recorded to obtain the hole-extracting characteristics, for which the hole extracting times show the order CoOx (2.8 ns) < PEDOT:PSS (17.5 ns) < NiOx (22.8 ns) < CuOx (208.5 ns), consistent with the trend of their photovoltaic performances. The reproducibility and enduring stability of those devices were examined to show the outstanding long-term stability of the devices made of metal oxide HEL, for which the CoOx device retained PCE approximate to 12% for over 1000 h. |
URI: | http://dx.doi.org/10.1021/acsami.6b10803 http://hdl.handle.net/11536/132970 |
ISSN: | 1944-8244 |
DOI: | 10.1021/acsami.6b10803 |
期刊: | ACS APPLIED MATERIALS & INTERFACES |
Volume: | 8 |
Issue: | 49 |
起始頁: | 33592 |
結束頁: | 33600 |
顯示於類別: | 期刊論文 |