量子点浓度对用于量子点敏化太阳能电池的ZnO:TiO₂纳米混合光阳极中载流子传输的影响

Influence of Quantum Dot Concentration on Carrier Transport in ZnO:TiO₂ Nano-Hybrid Photoanodes for Quantum Dot-Sensitized Solar Cells.

作者信息

Maloney Francis S, Poudyal Uma, Chen Weimin, Wang Wenyong

机构信息

Department of Physics and Astronomy, University of Wyoming, Laramie, WY 82071, USA.

出版信息

Nanomaterials (Basel). 2016 Oct 25;6(11):191. doi: 10.3390/nano6110191.

DOI:10.3390/nano6110191

PMID:28335319

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5245735/

Abstract

Zinc oxide nanowire and titanium dioxide nanoparticle (ZnO:TiO₂ NW/NP) hybrid films were utilized as the photoanode layer in quantum dot-sensitized solar cells (QDSSCs). CdSe quantum dots (QDs) with a ZnS passivation layer were deposited on the ZnO:TiO₂ NW/NP layer as a photosensitizer by successive ion layer adsorption and reaction (SILAR). Cells were fabricated using a solid-state polymer electrolyte and intensity-modulated photovoltage and photocurrent spectroscopy (IMVS/PS) was carried out to study the electron transport properties of the cell. Increasing the SILAR coating number enhanced the total charge collection efficiency of the cell. The electron transport time constant and diffusion length were found to decrease as more QD layers were added.

摘要

氧化锌纳米线和二氧化钛纳米颗粒（ZnO:TiO₂ NW/NP）混合薄膜被用作量子点敏化太阳能电池（QDSSCs）的光阳极层。通过连续离子层吸附和反应（SILAR），将具有ZnS钝化层的CdSe量子点（QDs）作为光敏剂沉积在ZnO:TiO₂ NW/NP层上。使用固态聚合物电解质制造电池，并进行强度调制光电压和光电流光谱（IMVS/PS）研究电池的电子传输特性。增加SILAR涂层数可提高电池的总电荷收集效率。发现随着添加更多的量子点层，电子传输时间常数和扩散长度会减小。