Organic photovoltaic cells offer ultrahigh VOC of ∼ 1.2 V under AM 1.5G light and a high efficiency of 21.2 % under indoor light - Zongtao Wang; Ailing Tang; Helin Wang; Qiang Guo; Qing Guo; Xiangnan Sun; Zuo Xiao; Liming Ding; Erjun Zhou (Chemical Engineering Journal, 2023)