高效近红外和半透明非富勒烯受体有机光伏电池。
High Efficiency Near-Infrared and Semitransparent Non-Fullerene Acceptor Organic Photovoltaic Cells.
机构信息
Department of Electrical Engineering and Computer Science, University of Michigan , Ann Arbor, Michigan 48109, United States.
Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University , Suzhou, Jiangsu 215123, People's Republic of China.
出版信息
J Am Chem Soc. 2017 Nov 29;139(47):17114-17119. doi: 10.1021/jacs.7b11278. Epub 2017 Nov 16.
The absence of near-infrared (NIR) solar cells with high open circuit voltage (V) and external quantum efficiency (EQE) has impeded progress toward achieving organic photovoltaic (OPV) power conversion efficiency PCE > 15%. Here we report a small energy gap (1.3 eV), chlorinated nonfullerene acceptor-based solar cell with PCE = 11.2 ± 0.4%, short circuit current of 22.5 ± 0.6 mA cm, V = 0.70 ± 0.01 V and fill factor of 0.71 ± 0.02, which is the highest performance reported to date for NIR single junction OPVs. Importantly, the EQE of this NIR solar cell reaches 75%, between 650 and 850 nm while leaving a transparency window between 400 and 600 nm. The semitransparent OPV using an ultrathin (10 nm) Ag cathode shows PCE = 7.1 ± 0.1%, with an average visible transmittance of 43 ± 2%, Commission d'Eclairage chromaticity coordinates of (0.29, 0.32) and a color rendering index of 91 for simulated AM1.5 illumination transmitted through the cell.
近红外（NIR）太阳能电池的开路电压（V）和外量子效率（EQE）较高，但目前尚未实现，这阻碍了有机光伏（OPV）功率转换效率 PCE > 15%的进展。在这里，我们报告了一种小能隙（1.3 eV）、基于氯化非富勒烯受体的太阳能电池，其 PCE = 11.2 ± 0.4%，短路电流为 22.5 ± 0.6 mA cm，V = 0.70 ± 0.01 V，填充因子为 0.71 ± 0.02，这是迄今为止报道的 NIR 单结 OPV 的最高性能。重要的是，该 NIR 太阳能电池的 EQE 达到 75%，在 650nm 至 850nm 之间，同时在 400nm 至 600nm 之间留下透明窗口。使用超薄（10nm）Ag 阴极的半透明 OPV 显示出 PCE = 7.1 ± 0.1%，平均可见光透过率为 43 ± 2%，Commission d'Eclairage 色度坐标为（0.29，0.32），颜色渲染指数为 91，模拟 AM1.5 照明透过电池传输。
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