Infrared Colloidal Quantum Dots for Photovoltaics: Fundamentals and Recent Progress
Infrared Colloidal Quantum Dots for Photovoltaics: Fundamentals and Recent Progress
复制标题
DOI：
10.1002/adma.201001491
复制
发表时间：
2011-01-04
影响因子：
29.4
通讯作者：
Sargent, Edward H.
中科院分区：
文献类型：
--
作者：
Tang, Jiang;Sargent, Edward H.
胶体量子点(CQD)是低成本光伏领域中备受关注的溶液处理半导体。通过量子尺寸效应调节CQD薄膜的带隙，可以定制太阳能电池的吸收轮廓，以匹配到达地球的广泛的可见光和红外光谱。本文综述了基于碳量子点实现低成本、高效率太阳能电池的最新进展。我们特别关注CQD材料和提供红外和可见光波长太阳能转换的方法CQD光伏现在超过5%的太阳能转换效率，通过引入一种新的架构-耗尽异质结CQD太阳能电池，共同最大化电流、电压和填充系数。CQD太阳能电池在用于稳定性的材料处理方面也取得了重大进展，最近在空气环境中实现了更长的工作寿命。我们总结了器件操作方面的进展，以及在材料性能和工艺方面的新见解--包括新的电接触材料和沉积技术，以及CQD合成、表面处理和薄膜形成技术--这些都是这些快速进步的基础。
Colloidal quantum dots (CQDs) are solution-processed semiconductors of interest in low-cost photovoltaics. Tuning of the bandgap of CQD films via the quantum size effect enables customization of solar cells' absorption profile to match the sun's broad visible-and infrared-containing spectrum reaching the earth. Here we review recent progress in the realization of low-cost, efficient solar cells based on CQDs. We focus in particular on CQD materials and approaches that provide both infrared and visible-wavelength solar power conversion CQD photovoltaics now exceed 5% solar power conversion efficiency, achieved by the introduction of a new architecture, the depleted-heterojunction CQD solar cell, that jointly maximizes current, voltage, and fill factor. CQD solar cells have also seen major progress in materials processing for stability, recently achieving extended operating lifetimes in an air ambient. We summarize progress both in device operation and also in gaining new insights into materials properties and processing - including new electrical contact materials and deposition techniques, as well as CQD synthesis, surface treatments, film-forming technologies - that underpin these rapid advances.