Organic and solution-processed tandem solar cells with 17.3% efficiency.
Lingxian MengYamin ZhangXiangjian WanChenxi LiXin ZhangYanbo WangXin KeZuo XiaoLiming DingRuoxi XiaHin-Lap YipYong CaoYongsheng ChenPublished in: Science (New York, N.Y.) (2018)
Although organic photovoltaic (OPV) cells have many advantages, their performance still lags far behind that of other photovoltaic platforms. A fundamental reason for their low performance is the low charge mobility of organic materials, leading to a limit on the active-layer thickness and efficient light absorption. In this work, guided by a semi-empirical model analysis and using the tandem cell strategy to overcome such issues, and taking advantage of the high diversity and easily tunable band structure of organic materials, a record and certified 17.29% power conversion efficiency for a two-terminal monolithic solution-processed tandem OPV is achieved.