Substitutional doping of hybrid organic-inorganic perovskite crystals for thermoelectrics
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
Hybrid organic–inorganic perovskites have generated considerable research interest in the field of optoelectronic devices. However, there have been significantly fewer reports of their thermoelectric properties despite some promising early results. In this article, we investigate the thermoelectric properties of bismuth-doped CH3NH3PbBr3 (MAPbBr3) single crystals. The high-quality Bi-doped crystals were synthesized by inverse temperature crystallization and it was found that Bi substitutes onto the B-site of the ABX3 perovskite lattice of MAPbBr3 crystals with very little distortion of the crystal structure. Bi doping does not significantly alter the thermal conductivity but dramatically enhances the electrical conductivity of MAPbBr3, increasing the charge carrier density by more than three orders of magnitude. We obtained a negative Seebeck coefficient of −378 μV K−1 for 15% (x = 0.15) Bi-doped MAPb(1−x)BixBr3 confirming n-type doping and also measured the figure of merit, ZT. This work highlights routes towards controlled substitutional doping of halide perovskites to optimise them for thermoelectric applications.
Date Issued
2020-07-21
Date Acceptance
2020-06-24
Citation
Journal of Materials Chemistry A, 2020, 8 (27), pp.13594-13599
ISSN
2050-7488
Publisher
Royal Society of Chemistry
Start Page
13594
End Page
13599
Journal / Book Title
Journal of Materials Chemistry A
Volume
8
Issue
27
Copyright Statement
© The Royal Society of Chemistry 2020. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence http://creativecommons.org/licenses/by/3.0/
License URL
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000548452100014&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Energy & Fuels
Materials Science, Multidisciplinary
Chemistry
Materials Science
ULTRALOW THERMAL-CONDUCTIVITY
HALIDE PEROVSKITES
PHASE-TRANSITIONS
GROWTH
POWER
MOBILITIES
FIGURE
MERIT
TIN
Publication Status
Published
Date Publish Online
2020-06-25