Efficient and Layer‐Dependent Exciton Pumping across Atomically Thin Organic–Inorganic Type‐I Heterostructures

• DOI: 10.1002/adma.201803986
• Publication Date: 2018-08-30T12:46:06Z
• Authors: Linglong Zhang; Ankur Sharma; Yi Zhu; Yuhan Zhang; Bowen Wang; Miheng Dong; Hieu T. Nguyen; Zhu Wang; Bo Wen; Yujie Cao; Boqing Liu; Xueqian Sun; Jiong Yang; Ziyuan Li; Arara Kar; Yi Shi; Daniel Macdonald; Zongfu Yu; Xinran Wang; Yuerui Lu
• Keywords: Pentacene; Photoexcitation

Abstract The fundamental light–matter interactions in monolayer transition metal dichalcogenides might be significantly engineered by hybridization with their organic counterparts, enabling intriguing optoelectronic applications. Here, atomically thin organic–inorganic (O–I) heterostructures, comprising MoSe 2 and mono‐/few‐layer single‐crystal pentacene samples, are fabricated. These heterostructures show type‐I band alignments, allowing efficient layer‐dependent exciton pumping across the O–I interfaces. interfacial has much higher efficiency (>86 times) than photoexcitation process , although layer lower optical absorption . This highly enhanced is attributed to high quantum yield ultrafast energy transfer between interface. Furthermore, those counterparts modulate bindings of charged excitons via precise dielectric environment engineering. results open new avenues for exploring phenomena novel applications using heterostructures.