钝化
量子点
光伏
材料科学
纳米技术
制作
硫系化合物
光电子学
纳米颗粒
光伏系统
半导体
生物
生态学
病理
医学
替代医学
图层(电子)
作者
Jiang Tang,Kyle W. Kemp,Sjoerd Hoogland,Kwang Seob Jeong,Huan Liu,Larissa Levina,Melissa Furukawa,Xihua Wang,Ratan Debnath,Dongkyu Cha,Kang Wei Chou,A. Fischer,Aram Amassian,John B. Asbury,Edward H. Sargent
出处
期刊:Nature Materials
[Springer Nature]
日期:2011-09-16
卷期号:10 (10): 765-771
被引量:1459
摘要
Colloidal-quantum-dot (CQD) optoelectronics offer a compelling combination of solution processing and spectral tunability through quantum size effects. So far, CQD solar cells have relied on the use of organic ligands to passivate the surface of the semiconductor nanoparticles. Although inorganic metal chalcogenide ligands have led to record electronic transport parameters in CQD films, no photovoltaic device has been reported based on such compounds. Here we establish an atomic ligand strategy that makes use of monovalent halide anions to enhance electronic transport and successfully passivate surface defects in PbS CQD films. Both time-resolved infrared spectroscopy and transient device characterization indicate that the scheme leads to a shallower trap state distribution than the best organic ligands. Solar cells fabricated following this strategy show up to 6% solar AM1.5G power-conversion efficiency. The CQD films are deposited at room temperature and under ambient atmosphere, rendering the process amenable to low-cost, roll-by-roll fabrication.
科研通智能强力驱动
Strongly Powered by AbleSci AI