Degradation induced lattice anchoring self-passivation in CsPbI3−xBrx. Issue 19 (12th May 2020)
- Record Type:
- Journal Article
- Title:
- Degradation induced lattice anchoring self-passivation in CsPbI3−xBrx. Issue 19 (12th May 2020)
- Main Title:
- Degradation induced lattice anchoring self-passivation in CsPbI3−xBrx
- Authors:
- Xiu, Jingwei
Dong, Bo
Driscoll, Elizabeth
Feng, Xiyuan
Muhammad, Abubakar
Chen, Shaoqing
Du, Zheng
Zhu, Yudong
Zhang, Zheng
Tang, Zhaoheng
He, Zhubing
Slater, Peter Raymond - Abstract:
- Abstract : A facile ambient environment solution approach to prepare γ-CsPbI3− x Br x is reported for the first time, leading to samples that exhibit vastly improved stability towards both moisture and heating in air. Abstract : The all-inorganic halide perovskite (CsPbI3 ) holds promise for photovoltaic applications but suffers from a detrimental phase transformation to a non-perovskite phase δ-CsPbI3 at low-temperature. Of the different perovskite polymorphs, there has been a wide range of studies on γ-CsPbI3 due to its kinetic stability at near room-temperature. However, synthesis routes to this and other all-inorganic halide perovskites are still not ideal, requiring uneconomical elimination of humidity as well as quenching from elevated temperature. Water/moisture is commonly meticulously avoided due the fact that it can accelerate the detrimental degradation of the perovskite. In our synthesis, we used an alternative approach of engineering an in situ degradation process to form a dual-functional PbI(OH) protective covering and succeeded in performing the first room-temperature synthesis of γ-CsPbI3 under ambient humidity. The vastly improved stability benefits from both lattice anchoring and physical coverage of γ-CsPbI3 by an ultra-thin PbI(OH) layer. The resultant γ-CsPbI3 is stable for more than 2 months under ambient conditions (25 °C, RH = 30–60%) and more than 12 hours at 175 °C in air without any degradation. Furthermore, we show that this novel facile methodAbstract : A facile ambient environment solution approach to prepare γ-CsPbI3− x Br x is reported for the first time, leading to samples that exhibit vastly improved stability towards both moisture and heating in air. Abstract : The all-inorganic halide perovskite (CsPbI3 ) holds promise for photovoltaic applications but suffers from a detrimental phase transformation to a non-perovskite phase δ-CsPbI3 at low-temperature. Of the different perovskite polymorphs, there has been a wide range of studies on γ-CsPbI3 due to its kinetic stability at near room-temperature. However, synthesis routes to this and other all-inorganic halide perovskites are still not ideal, requiring uneconomical elimination of humidity as well as quenching from elevated temperature. Water/moisture is commonly meticulously avoided due the fact that it can accelerate the detrimental degradation of the perovskite. In our synthesis, we used an alternative approach of engineering an in situ degradation process to form a dual-functional PbI(OH) protective covering and succeeded in performing the first room-temperature synthesis of γ-CsPbI3 under ambient humidity. The vastly improved stability benefits from both lattice anchoring and physical coverage of γ-CsPbI3 by an ultra-thin PbI(OH) layer. The resultant γ-CsPbI3 is stable for more than 2 months under ambient conditions (25 °C, RH = 30–60%) and more than 12 hours at 175 °C in air without any degradation. Furthermore, we show that this novel facile method can be successfully applied to mixed halide perovskites such as CsPbI2 Br, and this has allowed the first experimental synthesis of the γ-polymorph of CsPbI2 Br. Thus, our work provides an efficient degradation-induced lattice-anchoring self-stabilization strategy and a new avenue to the economical synthesis of all-inorganic perovskite materials at room-temperature under ambient conditions. … (more)
- Is Part Of:
- Journal of materials chemistry. Volume 8:Issue 19(2020)
- Journal:
- Journal of materials chemistry
- Issue:
- Volume 8:Issue 19(2020)
- Issue Display:
- Volume 8, Issue 19 (2020)
- Year:
- 2020
- Volume:
- 8
- Issue:
- 19
- Issue Sort Value:
- 2020-0008-0019-0000
- Page Start:
- 9963
- Page End:
- 9969
- Publication Date:
- 2020-05-12
- Subjects:
- Materials -- Research -- Periodicals
Chemistry, Analytic -- Periodicals
Environmental sciences -- Research -- Periodicals
543.0284 - Journal URLs:
- http://pubs.rsc.org/en/journals/journalissues/ta ↗
http://www.rsc.org/ ↗ - DOI:
- 10.1039/d0ta02210a ↗
- Languages:
- English
- ISSNs:
- 2050-7488
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 5012.205100
British Library DSC - BLDSS-3PM
British Library STI - ELD Digital store - Ingest File:
- 13820.xml