设计并制备具有高吸收强度，宽响应范围且能进行高效电子/空穴传导的感光层一直是光电器件制备领域的研究重难点。以有机半导体给体:小分子受体:近红外量子点材料组成的感光层极具研究价值，而对其中各组分光响应范围进行匹配并通过对膜的形貌结构和各组分能带分布进行控制是提高该感光层性能的关键。本项目拟以共轭聚合物J61、非富勒烯受体ITIC以及近红外硫化铅（PbS）量子点为研究对象。主要内容包括：PbS量子点的合成，J61:ITIC:PbS固体薄膜的制备，配体置换对PbS量子点能带分布的调节，溶剂效应和不同组分比例对薄膜形貌结构的控制以及相关的电子/空穴传导机理的研究。该研究旨在运用吸收互补的光敏材料形成对太阳光谱具有强吸收和宽响应范围的感光层体系，同时保证感光层高效的电子/空穴传导，预期能获得覆盖可见至近红外区间光谱的感光层，可广泛应用于太阳能电池、光学传感器等领域。

Design and preparation of the photosensor film with the virtues of intense absorption, wide-range photoresponse and efficient electron/hole transportation is challenge, which has significant meaning to the photoelectronic field. The key factors of determining the performance of the photosensor are the absorption range of each composition, band alignment and morphology manipulation of the film. In this project, we plan to synthesize PbS quantum dots (QDs) which can be incorporated with J61 and ITIC to form a ternary system. Then, the post treatment of ligand exchange will be applied to tune the energy level of the PbS QDs in the pristine photosensor film of J61:ITIC:PbS QDs. The structure and morphology of the film will be manipulated to improve the exciton dissociation and charge mobility. Moreover, the mechanism of electron/hole transportation in the film will also be investigated. Overall, we aim to fabricate a photosensor film with all the advantages of intense absorption, wide range photoresponse (from visible to near infrared) and efficient electron/hole transportation, which is promising for the applications in the solar energy devices and photo sensors etc.