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Title: Mechanism for rapid growth of organic–inorganic halide perovskite crystals

Optoelectronic devices based on hybrid halide perovskites have shown remarkable progress to high performance. However, despite their apparent success, there remain many open questions about their intrinsic properties. Single crystals are often seen as the ideal platform for understanding the limits of crystalline materials, and recent reports of rapid, high-temperature crystallization of single crystals should enable a variety of studies. Here we explore the mechanism of this crystallization and find that it is due to reversible changes in the solution where breaking up of colloids, and a change in the solvent strength, leads to supersaturation and subsequent crystallization. Here, we use this knowledge to demonstrate a broader range of processing parameters and show that these can lead to improved crystal quality. Lastly, our findings are therefore of central importance to enable the continued advancement of perovskite optoelectronics and to the improved reproducibility through a better understanding of factors influencing and controlling crystallization.
Authors:
 [1] ;  [2] ; ORCiD logo [1] ;  [3] ;  [1] ;  [4] ;  [1] ;  [5] ;  [5] ; ORCiD logo [4] ;  [3] ;  [1]
  1. Univ. of Oxford (United Kingdom). Clarendon Lab., Dept. of Physics
  2. Univ. of Oxford (United Kingdom). Clarendon Lab., Dept. of Physics; National Renewable Energy Lab. (NREL), Golden, CO (United States). Chemistry & Nanoscience
  3. Univ. of Oxford (United Kingdom). Inorganic Chemistry Lab., Dept. of Chemistry
  4. Univ. of Oxford (United Kingdom). Physical and Theoretical Chemistry Lab., Dept. of Chemistry
  5. National Renewable Energy Lab. (NREL), Golden, CO (United States). Chemistry & Nanoscience
Publication Date:
Report Number(s):
NREL/JA-5900-67512
Journal ID: ISSN 2041-1723
Grant/Contract Number:
AC36-08GO28308; EP/M020517/1; ERC-2010-StG-258600; 337757
Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 7; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Research Org:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); NREL Director's Fellowship; European Research Council (ERC)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Perovskites; Optoelectronics; Crystallization; Electronic devices; Solar cells
OSTI Identifier:
1334738