材料科学
三元运算
聚合物太阳能电池
有机太阳能电池
接受者
聚合物
能量转换效率
聚合物混合物
化学工程
光电子学
复合材料
共聚物
物理
程序设计语言
工程类
计算机科学
凝聚态物理
作者
Bing‐Huang Jiang,Yipeng Wang,Chuang-Yi Liao,Yi‐Ming Chang,Yu‐Wei Su,Ru‐Jong Jeng,Chih‐Ping Chen
标识
DOI:10.1021/acsami.0c19198
摘要
Non-fullerene organic photovoltaics (OPVs) have displayed the highest power conversion efficiencies (PCEs) among OPVs. Herein, we describe a two-donor (PM6, TPD-3F)/one-acceptor (Y6) ternary blend having an optimized blend morphology that leads to improved OPV performance. Because TPD-3F has a HOMO energy level deeper than that of PM6, the value of VOC of the corresponding ternary device increased. Good miscibility between PM6 and TPD-3F, in conjunction with device optimization through the use of 1-chloronaphthalene as an additive, provided an optimized ternary blend morphology for efficient exciton dissociation and carrier transport and, therefore, larger PCE. Compared with the preoptimized PM6:Y6 binary device, the ternary device functioned with improvements in its short-circuit current density, value of VOC, and fill factor. As a result, the device PCE improved from 15.5 ± 0.19 to 16.6 ± 0.25% under AM 1.5G (100 mW cm–2) irradiation. The champion cell exhibited a PCE of 17.0%—a value that is one of the highest for a ternary OPV. Furthermore, such devices exhibited outstanding shelf lifetimes, with long-term stability in air (25 °C, 40% humidity) without encapsulation; the performance remained high (at 15.4%) after storage for 820 h.
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