Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Aron Walsh | * |
dc.date.accessioned | 2023-08-03T16:30:04Z | - |
dc.date.available | 2023-08-03T16:30:04Z | - |
dc.date.issued | 2023 | * |
dc.identifier.issn | 1932-7447 | * |
dc.identifier.other | OAK-33633 | * |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/265439 | - |
dc.description.abstract | Polytypes formed during the growth of metal halide perovskites can give rise to the formation of face-sharing sequences in corner-sharing octahedral networks. Here, the electronic influences of such structures, including the 6H and 12R phases, are found to be correlated with the fraction and stacking sequence of the face-sharing layers. The band gaps of polytypes feature a characteristic evolution from indirect to direct from pure hexagonal (2H) to cubic (3C) phases. Rather than arising from orbital mixing at the atomic level, a large band gap bowing of 1.96 eV in the CsPbI3 family was attributed to the long-range electronic interaction between octahedral building blocks. While retaining a high carrier velocity (∼2 × 105 m s-1), Fermi surface analysis further revealed a decrease of dimensionality from 3D to 2D in frequently observed polytypes, indicating a carrier blocking and anisotropic transport effect of hexagonal impurity phases, with consequences for their applications in solar cells and other optoelectronic devices. © 2023 The Authors. Published by American Chemical Society | * |
dc.language | English | * |
dc.publisher | American Chemical Society | * |
dc.title | From Cubic to Hexagonal: Electronic Trends across Metal Halide Perovskite Polytypes | * |
dc.type | Article | * |
dc.relation.issue | 26 | * |
dc.relation.volume | 127 | * |
dc.relation.index | SCIE | * |
dc.relation.index | SCOPUS | * |
dc.relation.startpage | 12695 | * |
dc.relation.lastpage | 12701 | * |
dc.relation.journaltitle | Journal of Physical Chemistry C | * |
dc.identifier.doi | 10.1021/acs.jpcc.3c01232 | * |
dc.identifier.wosid | WOS:001016633900001 | * |
dc.identifier.scopusid | 2-s2.0-85164408009 | * |
dc.author.google | Li Z. | * |
dc.author.google | Park J.-S. | * |
dc.author.google | Ganose A.M. | * |
dc.author.google | Walsh A. | * |
dc.contributor.scopusid | Aron Walsh(35315151400) | * |
dc.date.modifydate | 20240318110835 | * |