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Lead-free double halide perovskite Cs 3 BiBr 6 with well-defined crystal structure and high thermal stability for optoelectronics

Tang, Yingying; Liang, Mingli; Chang, Bingdong; Sun, Hongyu; Zheng, Kaibo LU ; Pullerits, Tönu LU and Chi, Qijin (2019) In Journal of Materials Chemistry C 7(11). p.3369-3374
Abstract


Halide perovskites have continued to rise as attractive light absorber materials, mainly driven by their potential wide applications in the fields of solar cells, photodetectors, lasers and others. However, Pb-containing perovskites are poisonous and could cause serious potential problems to our environment. Thus, there is a strong desire to develop lead-free perovskites as environmentally friendly alternatives. Here, we have shown a successful synthesis of a non-toxic single crystalline double-halide perovskite, Cs
3
BiBr ... (More)


Halide perovskites have continued to rise as attractive light absorber materials, mainly driven by their potential wide applications in the fields of solar cells, photodetectors, lasers and others. However, Pb-containing perovskites are poisonous and could cause serious potential problems to our environment. Thus, there is a strong desire to develop lead-free perovskites as environmentally friendly alternatives. Here, we have shown a successful synthesis of a non-toxic single crystalline double-halide perovskite, Cs
3
BiBr
6
, and analysed its structural characteristics in detail. This perovskite represents a new structure in terms of double-halide perovskites. The crystal structure features isolated BiBr
6
polyhedra forming a zero-dimensional halide perovskite. The bandgap of this compound is measured to be 2.55 eV. High thermal stability is also clearly shown in the Cs
3
BiBr
6
single crystal. A photodetector based on this compound is fabricated and tested, which exhibits an impressive detectivity of 0.8 × 10
9
Jones and low dark current under 400 nm light illumination. Overall, our results show that the Cs
3
BiBr
6
perovskite as a lead-free perovskite has interesting structures and promising properties for optoelectronic devices.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Materials Chemistry C
volume
7
issue
11
pages
6 pages
publisher
Royal Society of Chemistry
external identifiers
  • scopus:85062887681
ISSN
2050-7534
DOI
10.1039/c8tc05480k
language
English
LU publication?
yes
id
1617ce42-e070-4c30-907b-e2cb7ebf2a10
date added to LUP
2019-03-22 08:27:26
date last changed
2019-04-23 04:47:17
@article{1617ce42-e070-4c30-907b-e2cb7ebf2a10,
  abstract     = {<p><br>
                                                         Halide perovskites have continued to rise as attractive light absorber materials, mainly driven by their potential wide applications in the fields of solar cells, photodetectors, lasers and others. However, Pb-containing perovskites are poisonous and could cause serious potential problems to our environment. Thus, there is a strong desire to develop lead-free perovskites as environmentally friendly alternatives. Here, we have shown a successful synthesis of a non-toxic single crystalline double-halide perovskite, Cs                             <br>
                            <sub>3</sub><br>
                                                         BiBr                             <br>
                            <sub>6</sub><br>
                                                         , and analysed its structural characteristics in detail. This perovskite represents a new structure in terms of double-halide perovskites. The crystal structure features isolated BiBr                             <br>
                            <sub>6</sub><br>
                                                          polyhedra forming a zero-dimensional halide perovskite. The bandgap of this compound is measured to be 2.55 eV. High thermal stability is also clearly shown in the Cs                             <br>
                            <sub>3</sub><br>
                                                         BiBr                             <br>
                            <sub>6</sub><br>
                                                          single crystal. A photodetector based on this compound is fabricated and tested, which exhibits an impressive detectivity of 0.8 × 10                             <br>
                            <sup>9</sup><br>
                                                          Jones and low dark current under 400 nm light illumination. Overall, our results show that the Cs                             <br>
                            <sub>3</sub><br>
                                                         BiBr                             <br>
                            <sub>6</sub><br>
                                                          perovskite as a lead-free perovskite has interesting structures and promising properties for optoelectronic devices.                         <br>
                        </p>},
  author       = {Tang, Yingying and Liang, Mingli and Chang, Bingdong and Sun, Hongyu and Zheng, Kaibo and Pullerits, Tönu and Chi, Qijin},
  issn         = {2050-7534},
  language     = {eng},
  number       = {11},
  pages        = {3369--3374},
  publisher    = {Royal Society of Chemistry},
  series       = {Journal of Materials Chemistry C},
  title        = {Lead-free double halide perovskite Cs                         
                        <sub>3</sub>
                                                 BiBr                         
                        <sub>6</sub>
                                                  with well-defined crystal structure and high thermal stability for optoelectronics},
  url          = {http://dx.doi.org/10.1039/c8tc05480k},
  volume       = {7},
  year         = {2019},
}