Abstract

A study is made of the effect a surface ligand’s molecules have on the photoconductivity and photovoltaic effect in thin solid layers of structures based on PbS quantum dots. Thin solid layers are prepared of both quantum dots and bulk heterojunctions of a blend of quantum dots and fullerene derivative ([6,6]-phenyl-C(61)butyric acid ester (PCBM)). An exponential dependence of photoconductivity on the length of ligands is obtained for the quantum dot films, and the photovoltaic effect displays a strong dependence on the length of a ligand. In contrast, the effect the length of a ligand has on current–voltage characteristics and charge carrier mobility was not observed in bulk heterojunction structures with quantum dots. Physical reasons for the observed phenomena are discussed.

中文翻译：

---

基于PbS量子点和富勒烯衍生物的复合薄膜的光伏特性：丁酸的复杂酯

摘要

研究了表面配体分子对基于PbS量子点的结构的薄固体层中的光电导和光伏效应的影响。由量子点和量子点与富勒烯衍生物（[6,6]-苯基-C（61）丁酸酯（PCBM））的混合物的本体异质结制备薄的固体层。对于量子点膜，获得了光电导对配体长度的指数依赖性，并且光伏效应显示出对配体长度的强烈依赖性。相反，在具有量子点的本体异质结结构中，未观察到配体的长度对电流-电压特性的影响，并且没有发现载流子迁移率。讨论了观察到的现象的物理原因。