材料科学
光电探测器
异质结
光伏系统
有机太阳能电池
光电子学
聚合物太阳能电池
有机半导体
混合太阳能电池
载流子
太阳能电池
能量转换效率
激子
纳米技术
半导体
工程物理
聚合物
物理
电气工程
量子力学
工程类
复合材料
作者
Andrew Wadsworth,Z. Abdel Hamid,Ján Koščo,Nicola Gasparini,Iain McCulloch
标识
DOI:10.1002/adma.202001763
摘要
Abstract Organic semiconductors require an energetic offset in order to photogenerate free charge carriers efficiently, owing to their inability to effectively screen charges. This is vitally important in order to achieve high power conversion efficiencies in organic solar cells. Early heterojunction‐based solar cells were limited to relatively modest efficiencies (<4%) owing to limitations such as poor exciton dissociation, limited photon harvesting, and high recombination losses. The development of the bulk heterojunction (BHJ) has significantly overcome these issues, resulting in dramatic improvements in organic photovoltaic performance, now exceeding 18% power conversion efficiencies. Here, the design and engineering strategies used to develop the optimal bulk heterojunction for solar‐cell, photodetector, and photocatalytic applications are discussed. Additionally, the thermodynamic driving forces in the creation and stability of the bulk heterojunction are presented, along with underlying photophysics in these blends. Finally, new opportunities to apply the knowledge accrued from BHJ solar cells to generate free charges for use in promising new applications are discussed.
科研通智能强力驱动
Strongly Powered by AbleSci AI