Inorganic caesium lead iodide perovskite solar cells
The vast majority of perovskite solar cell research has focused on organic-inorganic lead trihalide perovskites. Herein, we present working inorganic CsPbI<inf>3</inf> perovskite solar cells for the first time. CsPbI<inf>3</inf> normally resides in a yellow non-perovskite pha...
| Main Authors: | , , , , , , |
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| Format: | Journal article |
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Royal Society of Chemistry
2015
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| _version_ | 1826267398069551104 |
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| author | Eperon, G Paternò, G Sutton, R Zampetti, A Haghighirad, A Cacialli, F Snaith, H |
| author_facet | Eperon, G Paternò, G Sutton, R Zampetti, A Haghighirad, A Cacialli, F Snaith, H |
| author_sort | Eperon, G |
| collection | OXFORD |
| description | The vast majority of perovskite solar cell research has focused on organic-inorganic lead trihalide perovskites. Herein, we present working inorganic CsPbI<inf>3</inf> perovskite solar cells for the first time. CsPbI<inf>3</inf> normally resides in a yellow non-perovskite phase at room temperature, but by careful processing control and development of a low-temperature phase transition route we have stabilised the material in the black perovskite phase at room temperature. As such, we have fabricated solar cell devices in a variety of architectures, with current-voltage curve measured efficiency up to 2.9% for a planar heterojunction architecture, and stabilised power conversion efficiency of 1.7%. The well-functioning planar junction devices demonstrate long-range electron and hole transport in this material. Importantly, this work identifies that the organic cation is not essential, but simply a convenience for forming lead triiodide perovskites with good photovoltaic properties. We additionally observe significant rate-dependent current-voltage hysteresis in CsPbI<inf>3</inf> devices, despite the absence of the organic polar molecule previously thought to be a candidate for inducing hysteresis via ferroelectric polarisation. Due to its space group, CsPbI<inf>3</inf> cannot be a ferroelectric material, and thus we can conclude that ferroelectricity is not required to explain current-voltage hysteresis in perovskite solar cells. Our report of working inorganic perovskite solar cells paves the way for further developments likely to lead to much more thermally stable perovskite solar cells and other optoelectronic devices. |
| first_indexed | 2024-03-06T20:53:35Z |
| format | Journal article |
| id | oxford-uuid:386e3ba9-eba9-4b6c-b6cc-36355e5120bc |
| institution | University of Oxford |
| last_indexed | 2024-03-06T20:53:35Z |
| publishDate | 2015 |
| publisher | Royal Society of Chemistry |
| record_format | dspace |
| spelling | oxford-uuid:386e3ba9-eba9-4b6c-b6cc-36355e5120bc2022-03-26T13:49:58ZInorganic caesium lead iodide perovskite solar cellsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:386e3ba9-eba9-4b6c-b6cc-36355e5120bcSymplectic Elements at OxfordRoyal Society of Chemistry2015Eperon, GPaternò, GSutton, RZampetti, AHaghighirad, ACacialli, FSnaith, HThe vast majority of perovskite solar cell research has focused on organic-inorganic lead trihalide perovskites. Herein, we present working inorganic CsPbI<inf>3</inf> perovskite solar cells for the first time. CsPbI<inf>3</inf> normally resides in a yellow non-perovskite phase at room temperature, but by careful processing control and development of a low-temperature phase transition route we have stabilised the material in the black perovskite phase at room temperature. As such, we have fabricated solar cell devices in a variety of architectures, with current-voltage curve measured efficiency up to 2.9% for a planar heterojunction architecture, and stabilised power conversion efficiency of 1.7%. The well-functioning planar junction devices demonstrate long-range electron and hole transport in this material. Importantly, this work identifies that the organic cation is not essential, but simply a convenience for forming lead triiodide perovskites with good photovoltaic properties. We additionally observe significant rate-dependent current-voltage hysteresis in CsPbI<inf>3</inf> devices, despite the absence of the organic polar molecule previously thought to be a candidate for inducing hysteresis via ferroelectric polarisation. Due to its space group, CsPbI<inf>3</inf> cannot be a ferroelectric material, and thus we can conclude that ferroelectricity is not required to explain current-voltage hysteresis in perovskite solar cells. Our report of working inorganic perovskite solar cells paves the way for further developments likely to lead to much more thermally stable perovskite solar cells and other optoelectronic devices. |
| spellingShingle | Eperon, G Paternò, G Sutton, R Zampetti, A Haghighirad, A Cacialli, F Snaith, H Inorganic caesium lead iodide perovskite solar cells |
| title | Inorganic caesium lead iodide perovskite solar cells |
| title_full | Inorganic caesium lead iodide perovskite solar cells |
| title_fullStr | Inorganic caesium lead iodide perovskite solar cells |
| title_full_unstemmed | Inorganic caesium lead iodide perovskite solar cells |
| title_short | Inorganic caesium lead iodide perovskite solar cells |
| title_sort | inorganic caesium lead iodide perovskite solar cells |
| work_keys_str_mv | AT eperong inorganiccaesiumleadiodideperovskitesolarcells AT paternog inorganiccaesiumleadiodideperovskitesolarcells AT suttonr inorganiccaesiumleadiodideperovskitesolarcells AT zampettia inorganiccaesiumleadiodideperovskitesolarcells AT haghighirada inorganiccaesiumleadiodideperovskitesolarcells AT caciallif inorganiccaesiumleadiodideperovskitesolarcells AT snaithh inorganiccaesiumleadiodideperovskitesolarcells |