Low Temperature Synthesis of Stable γ-CsPbI 3 Perovskite Layers for Solar Cells Obtained by High Throughput Experimentation
(2019) In Advanced Energy Materials 9(22).- Abstract
The structural phases and optoelectronic properties of coevaporated CsPbI
3
thin films with a wide range of [CsI]/[PbI
2
] compositional ratios are investigated using high throughput experimentation and gradient samples. It is found that for CsI-rich growth conditions, CsPbI
3
can... (More)
(Less)
The structural phases and optoelectronic properties of coevaporated CsPbI
3
thin films with a wide range of [CsI]/[PbI
2
] compositional ratios are investigated using high throughput experimentation and gradient samples. It is found that for CsI-rich growth conditions, CsPbI
3
can be synthesized directly at low temperature into the distorted perovskite γ-CsPbI
3
phase without detectable secondary phases. In contrast, PbI
2
-rich growth conditions are found to lead to the non-perovskite δ-phase. Photoluminescence spectroscopy and optical-pump THz-probe mapping show carrier lifetimes larger than 75 ns and charge carrier (sum) mobilities larger than 60 cm
2
V
−1
s
−1
for the γ-phase, indicating their suitability for high efficiency solar cells. The dependence of the carrier mobilities and luminescence peak energy on the Cs-content in the films indicates the presence of Schottky defect pairs, which may cause the stabilization of the γ-phase. Building on these results, p–i–n type solar cells with a maximum efficiency exceeding 12% and high shelf stability of more than 1200 h are demonstrated, which in the future could still be significantly improved, judging on their bulk optoelectronic properties.
- author
- Becker, Pascal ; Márquez, José A. ; Just, Justus LU ; Al-Ashouri, Amran ; Hages, Charles ; Hempel, Hannes ; Jošt, Marko ; Albrecht, Steve ; Frahm, Ronald and Unold, Thomas
- organization
- publishing date
- 2019
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- coevaporation, high throughput characterization, inorganic halide perovskites, optoelectronics, thin film solar cells
- in
- Advanced Energy Materials
- volume
- 9
- issue
- 22
- article number
- 1900555
- publisher
- Wiley-Blackwell
- external identifiers
-
- scopus:85065047621
- ISSN
- 1614-6832
- DOI
- 10.1002/aenm.201900555
- language
- English
- LU publication?
- yes
- id
- e6924408-8f81-402b-8e4b-da2ade7c08af
- date added to LUP
- 2019-05-17 13:55:49
- date last changed
- 2024-08-06 16:09:58
@article{e6924408-8f81-402b-8e4b-da2ade7c08af, abstract = {{<p><br> The structural phases and optoelectronic properties of coevaporated CsPbI <br> <sub>3</sub><br> thin films with a wide range of [CsI]/[PbI <br> <sub>2</sub><br> ] compositional ratios are investigated using high throughput experimentation and gradient samples. It is found that for CsI-rich growth conditions, CsPbI <br> <sub>3</sub><br> can be synthesized directly at low temperature into the distorted perovskite γ-CsPbI <br> <sub>3</sub><br> phase without detectable secondary phases. In contrast, PbI <br> <sub>2</sub><br> -rich growth conditions are found to lead to the non-perovskite δ-phase. Photoluminescence spectroscopy and optical-pump THz-probe mapping show carrier lifetimes larger than 75 ns and charge carrier (sum) mobilities larger than 60 cm <br> <sup>2</sup><br> V <br> <sup>−1</sup><br> s <br> <sup>−1</sup><br> for the γ-phase, indicating their suitability for high efficiency solar cells. The dependence of the carrier mobilities and luminescence peak energy on the Cs-content in the films indicates the presence of Schottky defect pairs, which may cause the stabilization of the γ-phase. Building on these results, p–i–n type solar cells with a maximum efficiency exceeding 12% and high shelf stability of more than 1200 h are demonstrated, which in the future could still be significantly improved, judging on their bulk optoelectronic properties. <br> </p>}}, author = {{Becker, Pascal and Márquez, José A. and Just, Justus and Al-Ashouri, Amran and Hages, Charles and Hempel, Hannes and Jošt, Marko and Albrecht, Steve and Frahm, Ronald and Unold, Thomas}}, issn = {{1614-6832}}, keywords = {{coevaporation; high throughput characterization; inorganic halide perovskites; optoelectronics; thin film solar cells}}, language = {{eng}}, number = {{22}}, publisher = {{Wiley-Blackwell}}, series = {{Advanced Energy Materials}}, title = {{Low Temperature Synthesis of Stable γ-CsPbI <sub>3</sub> Perovskite Layers for Solar Cells Obtained by High Throughput Experimentation}}, url = {{http://dx.doi.org/10.1002/aenm.201900555}}, doi = {{10.1002/aenm.201900555}}, volume = {{9}}, year = {{2019}}, }