PbS量子点的化学制备及其太阳能光伏特性  

Preparation of PbS quantum dots for quantum dot-sensitized solar cells

作　　者：葛美英[1] 刘玉峰[1] 罗海瀚[1] 黄婵燕[1] 孙艳[1] 戴宁[1] 

机构地区：[1]中国科学院上海技术物理研究所红外物理国家重点实验室,上海200083

出　　处：《红外与毫米波学报》2013年第5期385-388,共4页Journal of Infrared and Millimeter Waves

基　　金：科技部973计划(2011CBA00900;2010CB93370);国家自然科学基金(11204335)~~

摘　　要：通过化学溶液体系中反应温度与原料配比的控制合成了第一吸收峰在833 ～ 1700 nm范围内可调的PbS量子点.利用X射线衍射（XRD）、透射电子显微镜（TEM）和高分辨透射电子显微镜（HRTEM）、吸收光谱等手段研究了化学溶液法制备的PbS量子点形貌、尺寸分布以及近红外吸收等特性.所获得的量子点尺寸分布均匀,直径在2.6～7.0 nm范围内可调.基于PbS量子点的红外吸收特性,通过表面修饰方法在原子层沉积技术（ALD）生长的TiO2薄膜上构筑了FTO/TiO2/PbS/Au光伏器件结构,并初步研究了光电流与量子点特征吸收的关系等光电转换特性.Colloidal PbS quantum dots （QDs） with spectral tunability through quantum size effects were synthesized by chemical solution. By controlling the reaction temperature and preparing proper precursor, we obtained QDs with first ab- sorption peak varied from 833 nm to 1706 nm. The structures, size distribution, and absorption properties of the QDs were measured by means of X-ray diffraction （XRD）, transmission electron microscopy （TEM）, high-resolution transmission electron microscopy （HRTEM） and absorption spectra. Results showed that PbS quantum dots had narrow size distribu- tions with diameters in the range of 2.6 ~ 7.0 nm. Based on the near infrared absorption properties of PbS QDs, we fabri- cated FTO/TiO2/PbS/Au solar cells by controlling the surface properties of PbS QDs on TiO2 film deposited with atomic layer deposition （ALD） and studied the relation between the photocurrent and the characteristic absorption peak of QDs.

关 键 词：PBS 量子点 耗尽层异质结太阳能电池 

分 类 号：O472[理学—半导体物理]