The complete in-gap electronic structure of colloidal quantum dot solids and its correlation with electronic transport and photovoltaic performance
Journal article published in 2013 by
Khabiboulakh Katsiev,
Alex H. Ip,
Armin H. 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 A. Dowben,
Edward H. Sargent
and other authors.
,
Oleksandr Voznyy,
Lisa R. Rollny,
Kang Wei Chou,
Susanna M. Thon ,
Graham H. Carey,
Xiaoyu Cui,
Aram Amassian,
Peter A. Dowben,
Edward H. Sargent
and other authors.
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Abstract
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. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.