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This content will become publicly available on March 15, 2019

Title: The Relationship between Chemical Flexibility and Nanoscale Charge Collection in Hybrid Halide Perovskites

Hybrid organometal halide perovskites are known for their excellent optoelectronic functionality as well as their wide-ranging chemical flexibility. The composition of hybrid perovskite devices has trended toward increasing complexity as fine-tuned properties are pursued, including multi-element mixing on the constituent A, B, and halide sites. However, this tunability presents potential challenges for charge extraction in functional devices. Poor consistency and repeatability between devices may arise due to variations in composition and microstructure. Within a single device, spatial heterogeneity in composition and phase segregation may limit the device from achieving its performance potential. This article details how the nanoscale elemental distribution and charge collection in hybrid perovskite materials evolve as chemical complexity increases, highlighting recent results using non-destructive operando synchrotron-based X-ray nanoprobe techniques. In conclusion, the results reveal a strong link between local chemistry and charge collection that must be controlled to develop robust, high-performance hybrid perovskite materials for optoelectronic devices.
Authors:
 [1] ;  [2] ;  [3] ;  [1] ;  [4] ;  [3] ;  [2] ; ORCiD logo [1]
  1. Univ. of California San Diego, La Jolla, CA (United States)
  2. The Hebrew Univ. of Jerusalem, Jerusalem (Israel)
  3. Arizona State Univ., Tempe, AZ (United States)
  4. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Grant/Contract Number:
AC02-06CH11357; EEC-433 1041895
Type:
Accepted Manuscript
Journal Name:
Advanced Functional Materials
Additional Journal Information:
Journal Volume: 28; Journal Issue: 18; Journal ID: ISSN 1616-301X
Publisher:
Wiley
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); California Energy Commission; National Science Foundation (NSF)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; hybrid perovskite; mixed halide; nanoprobe x-ray fluorescence
OSTI Identifier:
1471539
Alternate Identifier(s):
OSTI ID: 1426323