High efficiency perovskite quantum dot solar cells with charge separating heterostructure

Zhao, Qian; Hazarika, Abhijit; Chen, Xihan; Harvey, Steve P.; Larson, Bryon W.; Teeter, Glenn R.; Liu, Jun; Song, Tao; Xiao, Chuanxiao; Shaw, Liam; Zhang, Minghui; Li, Guoran; Beard, Matthew C.; Luther, Joseph M.

doi:10.1038/s41467-019-10856-z

High efficiency perovskite quantum dot solar cells with charge separating heterostructure

Journal Article · Fri Jun 28 00:00:00 EDT 2019 · Nature Communications

DOI:https://doi.org/10.1038/s41467-019-10856-z· OSTI ID:1635146

Zhao, Qian; ; ; ; ; ; Liu, Jun; Song, Tao; ; Shaw, Liam; Zhang, Minghui; ; Beard, Matthew C.;

Abstract

Metal halide perovskite semiconductors possess outstanding characteristics for optoelectronic applications including but not limited to photovoltaics. Low-dimensional and nanostructured motifs impart added functionality which can be exploited further. Moreover, wider cation composition tunability and tunable surface ligand properties of colloidal quantum dot (QD) perovskites now enable unprecedented device architectures which differ from thin-film perovskites fabricated from solvated molecular precursors. Here, using layer-by-layer deposition of perovskite QDs, we demonstrate solar cells with abrupt compositional changes throughout the perovskite film. We utilize this ability to abruptly control composition to create an internal heterojunction that facilitates charge separation at the internal interface leading to improved photocarrier harvesting. We show how the photovoltaic performance depends upon the heterojunction position, as well as the composition of each component, and we describe an architecture that greatly improves the performance of perovskite QD photovoltaics.

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Sponsoring Organization:: USDOE

OSTI ID:: 1635146

Alternate ID(s):: OSTI ID: 1542760

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 10; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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