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.
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
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)~~
