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Mixed-Halide Double...
Mixed-Halide Double Perovskite Cs2AgBiX6 (X=Br, I) with Tunable Optical Properties via Anion Exchange
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- Wu, Hua (författare)
- Uppsala universitet,Fysikalisk kemi
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- Erbing, Axel (författare)
- Stockholms universitet,Fysikum,Stockholm Univ, Dept Phys, AlbaNova Univ Ctr, S-10691 Stockholm, Sweden.
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- Johansson, Malin B., 1972- (författare)
- Uppsala universitet,Fysikalisk kemi
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- Wang, JunXin (författare)
- Uppsala universitet,Fasta tillståndets fysik,Univ Oxford, Dept Chem, Chem Res Lab, 12 Mansfield Rd, Oxford OX1 3TA, England.
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- Kamal, Chinnathambi (författare)
- Stockholms universitet,Fysikum,HRDS Raja Ramanna Centre for Advanced Technology, India,Stockholm Univ, Dept Phys, AlbaNova Univ Ctr, S-10691 Stockholm, Sweden.;Raja Ramanna Ctr Adv Technol, Theory & Simulat Lab, HRDS, Indore 452013, India.
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- Odelius, Michael (författare)
- Stockholms universitet,Fysikum,Stockholm Univ, Dept Phys, AlbaNova Univ Ctr, S-10691 Stockholm, Sweden.
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- Johansson, Erik M.J. (författare)
- Uppsala universitet,Fysikalisk kemi
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(creator_code:org_t)
- 2021-09-02
- 2021
- Engelska.
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Ingår i: ChemSusChem. - : Wiley. - 1864-5631 .- 1864-564X. ; 14:20, s. 4507-4515
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Abstract
Ämnesord
Stäng
- Lead-free double perovskites, A2M+M′3+X6, are considered as promising alternatives to lead-halide perovskites, in optoelectronics applications. Although iodide (I) and bromide (Br) mixing is a versatile tool for bandgap tuning in lead perovskites, similar mixed I/Br double perovskite films have not been reported in double perovskites, which may be due to the large activation energy for ion migration. In this work, mixed Br/I double perovskites were realized utilizing an anion exchange method starting from Cs2AgBiBr6 solid thin-films with large grain-size. The optical and structural properties were studied experimentally and theoretically. Importantly, the halide exchange mechanism was investigated. Hydroiodic acid was the key factor to facilitate the halide exchange reaction, through a dissolution–recrystallization process. In addition, the common organic iodide salts could successfully perform halide-exchange while retaining high mixed-halide phase stability and strong light absorption capability.
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Nyckelord
- bandgap engineering
- density functional calculations
- ion exchange
- lead-free double perovskites
- solar cells
- Green & Sustainable Science & Technology
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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