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Size effect of lead-free halide double perovskite on luminescence property

Han, Peigeng ; Zhang, Xue ; Mao, Xin ; Yang, Bin ; Yang, Songqiu ; Feng, Zhaochi ; Wei, Donghui ; Deng, Weiqiao ; Pullerits, Tõnu LU and Han, Keli (2019) In Science China Chemistry 62(10). p.1405-1413
Abstract

Lead-free halide double perovskites have gathered wide scientific interest since they are environmentally friendly and stable. However, compared to the lead perovskites, their optoelectronic properties are compromised. Herein we report a series of bulk lead-free mixed Bi-In halide double perovskites: Cs2AgBi1−xInxCl6 (0<x<1). The Cs2AgBi0.125In0.875Cl6 breaks the parity-forbidden transition and retains direct band gap structure, having warm-white light emission, with photoluminescence quantum efficiency (PLQE) of 70.3%, much higher than the PLQE of reported lead perovskite materials. Its exciton self-trapping dynamics is investigated.... (More)

Lead-free halide double perovskites have gathered wide scientific interest since they are environmentally friendly and stable. However, compared to the lead perovskites, their optoelectronic properties are compromised. Herein we report a series of bulk lead-free mixed Bi-In halide double perovskites: Cs2AgBi1−xInxCl6 (0<x<1). The Cs2AgBi0.125In0.875Cl6 breaks the parity-forbidden transition and retains direct band gap structure, having warm-white light emission, with photoluminescence quantum efficiency (PLQE) of 70.3%, much higher than the PLQE of reported lead perovskite materials. Its exciton self-trapping dynamics is investigated. Meanwhile, the Cs2AgBi0.125In0.875Cl6 nanocrystals and Cs2AgBi0.125In0.875Cl6 microcrystals can be synthesized by modified hot injection and rapid cooling crystallization, respectively. The size effect of Cs2AgBi0.125In0.875Cl6 is studied on the photoluminescence (PL) property. Additionally, the bulk material exhibits excellent stability on exposure to light, humidity and air for more than 3 months. It is a promising candidate as highly efficient warm white-light emitting material for road lighting.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
bulk crystals, double perovskite, size effect, stability, warm white
in
Science China Chemistry
volume
62
issue
10
pages
1405 - 1413
publisher
Science in China Press
external identifiers
  • scopus:85069461285
ISSN
1674-7291
DOI
10.1007/s11426-019-9520-1
language
English
LU publication?
yes
id
32c5d47a-44ae-4ca1-9f59-0187a5e396fa
date added to LUP
2019-08-12 09:01:49
date last changed
2020-02-12 10:12:51
@article{32c5d47a-44ae-4ca1-9f59-0187a5e396fa,
  abstract     = {<p>Lead-free halide double perovskites have gathered wide scientific interest since they are environmentally friendly and stable. However, compared to the lead perovskites, their optoelectronic properties are compromised. Herein we report a series of bulk lead-free mixed Bi-In halide double perovskites: Cs<sub>2</sub>AgBi<sub>1−x</sub>In<sub>x</sub>Cl<sub>6</sub> (0&lt;x&lt;1). The Cs<sub>2</sub>AgBi<sub>0.125</sub>In<sub>0.875</sub>Cl<sub>6</sub> breaks the parity-forbidden transition and retains direct band gap structure, having warm-white light emission, with photoluminescence quantum efficiency (PLQE) of 70.3%, much higher than the PLQE of reported lead perovskite materials. Its exciton self-trapping dynamics is investigated. Meanwhile, the Cs<sub>2</sub>AgBi<sub>0.125</sub>In<sub>0.875</sub>Cl<sub>6</sub> nanocrystals and Cs<sub>2</sub>AgBi<sub>0.125</sub>In<sub>0.875</sub>Cl<sub>6</sub> microcrystals can be synthesized by modified hot injection and rapid cooling crystallization, respectively. The size effect of Cs<sub>2</sub>AgBi<sub>0.125</sub>In<sub>0.875</sub>Cl<sub>6</sub> is studied on the photoluminescence (PL) property. Additionally, the bulk material exhibits excellent stability on exposure to light, humidity and air for more than 3 months. It is a promising candidate as highly efficient warm white-light emitting material for road lighting.</p>},
  author       = {Han, Peigeng and Zhang, Xue and Mao, Xin and Yang, Bin and Yang, Songqiu and Feng, Zhaochi and Wei, Donghui and Deng, Weiqiao and Pullerits, Tõnu and Han, Keli},
  issn         = {1674-7291},
  language     = {eng},
  month        = {07},
  number       = {10},
  pages        = {1405--1413},
  publisher    = {Science in China Press},
  series       = {Science China Chemistry},
  title        = {Size effect of lead-free halide double perovskite on luminescence property},
  url          = {http://dx.doi.org/10.1007/s11426-019-9520-1},
  doi          = {10.1007/s11426-019-9520-1},
  volume       = {62},
  year         = {2019},
}