材料科学
卤化物
钙钛矿(结构)
光催化
环加成
光化学
半导体
激子
有机半导体
光致发光
光电子学
无机化学
催化作用
化学
结晶学
有机化学
物理
量子力学
作者
Yixiong Lin,Mariana Avvacumova,Rong Zhao,Xihan Chen,Matthew C. Beard,Yong Yan
标识
DOI:10.1021/acsami.2c03411
摘要
Triplet excitons are generally confined within a semiconductor. Hence, solar energy utilization via direct triplet energy transfer (TET) from semiconductors is challenging. TET from lead halide perovskite semiconductors to nearby organic molecules has been illustrated with ultrafast spectroscopy. Direct utilization of solar energy, i.e., visible light, via TET for photocatalysis is an important route but has not yet been demonstrated with lead halide perovskite semiconductors. Here, we show that a photocatalytic reaction, focusing on a 2 + 2 cycloaddition reaction, can been successfully demonstrated via TET from lead halide perovskite nanocrystals (PNCs). The triplet excitons are shown to induce a highly diastereomeric syn-selective 2 + 2 cycloaddition starting from olefins. Such photocatalytic reactions probe the TET process previously only observed spectroscopically. Moreover, our observation demonstrates that bulk-like PNCs (size, >10 nm; PL = 530 nm), in addition to quantum-confined smaller PNCs, are also effective for TET. Our findings may render a new energy conversion pathway to employ PNCs via direct TET for photocatalytic organic synthesis.
科研通智能强力驱动
Strongly Powered by AbleSci AI