Khabiboulakh Katsiev, Alexander H. Ip, Armin Fischer, Iori Tanabe, Xin Zhang, Ahmad R. Kirmani, Oleksandr Voznyy, Lisa R. Rollny, Kang Wei Chou, Susanna M. Thon, Graham H. Carey, Xiaoyu Cui, Aram Amassian, Peter Dowben, Edward H. Sargent and Osman M. Bakr The Complete In-Gap Electronic Structure of Colloidal Quantum Dot Solids and Its Correlation with Electronic Transport and Photovoltaic Performance Advanced Materials 26
Version of Record online: 15 NOV 2013 | DOI: 10.1002/adma.201304166
The direct observation of the complete electronic band structure of a family of PbS CQD solids via photoelectron spectroscopy is reported. We investigate how materials processing strategies, such as the latest passivation methods that produce record-performance photovoltaics, achieve their performance advances. Halide passivated films show a drastic reduction in states in the midgap, contributing to a marked improvement in the device performance.
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