Surface sulfidation constructing gradient heterojunctions for high‐efficiency (approaching 18%) HTL‐free carbon‐based inorganic perovskite solar cells
Fuente:
Wiley Open Access
Saved in:
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Artículo Open Access |
| Published: |
Wiley
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1867013816928174081 |
|---|---|
| author | Xiaonan Huo Jinqing Lv Kexiang Wang Weiwei Sun Weifeng Liu Ran Yin Yansheng Sun Yukun Gao Tingting You Penggang Yin |
| author_facet | Xiaonan Huo Jinqing Lv Kexiang Wang Weiwei Sun Weifeng Liu Ran Yin Yansheng Sun Yukun Gao Tingting You Penggang Yin Xiaonan Huo Jinqing Lv Kexiang Wang Weiwei Sun Weifeng Liu Ran Yin Yansheng Sun Yukun Gao Tingting You Penggang Yin |
| collection | Wiley Open Access |
| contents | Surface sulfidation constructing gradient heterojunctions for high‐efficiency (approaching 18%) HTL‐free carbon‐based inorganic perovskite solar cells Xiaonan Huo Jinqing Lv Kexiang Wang Weiwei Sun Weifeng Liu Ran Yin Yansheng Sun Yukun Gao Tingting You Penggang Yin Carbon Energy AbstractDue to the advantages of cost‐effectiveness and tunable band gap, hole transport layer (HTL)‐free CsPbIXBr3−X carbon‐based inorganic perovskite solar cells (C‐IPSCs) are emerging candidates for both single junction and tandem solar cells. Because of the direct contact between the carbon electrode and the perovskite surface, energy barriers and defects at the interface limit the enhancement of power conversion efficiency (PCE). In this work, we first reported a preparation method of CsPbI2.75Br0.25 HTL‐free C‐IPSCs and developed an effective surface sulfidation regulation (SSR) strategy to promote hole extraction and inhibit non‐radiative recombination of inorganic perovskite by 2‐(thiocyanomethylthio)benzothiazole (TCMTB) surface modification. The introduced S2− anions form strong binding with uncoordinated Pb ions, inhibit the perovskite degradation reaction, and effectively passivate the surface defects. In addition, PbS formed by the SSR strategy constructed a gradient heterojunction, which promoted the arrangement energy levels and enhanced hole extraction. An additional back‐surface field is induced at the interface of perovskite by energy band bending, which increases the open‐circuit voltage (VOC). As a result, the SSR‐based CsPbI2.75Br0.25 HTL‐free C‐IPSCs showed a PCE of 17.88% with a fill factor of 81.56% and VOC of 1.19 V, which was among the highest reported values of CsPbI2.75Br0.25 HTL‐free C‐IPSCs. 10.1002/cey2.586 http://creativecommons.org/licenses/by/4.0/ |
| doi_str_mv | 10.1002/cey2.586 |
| format | Artículo Open Access |
| id | wiley_oa_10_1002_cey2_586 |
| institution | Wiley Open Access |
| license_str_mv | http://creativecommons.org/licenses/by/4.0/ |
| publishDate | 2024 |
| publisher | Wiley |
| record_format | wiley_oa |
| spellingShingle | Surface sulfidation constructing gradient heterojunctions for high‐efficiency (approaching 18%) HTL‐free carbon‐based inorganic perovskite solar cells Xiaonan Huo Jinqing Lv Kexiang Wang Weiwei Sun Weifeng Liu Ran Yin Yansheng Sun Yukun Gao Tingting You Penggang Yin Carbon Energy Surface sulfidation constructing gradient heterojunctions for high‐efficiency (approaching 18%) HTL‐free carbon‐based inorganic perovskite solar cells Xiaonan Huo Jinqing Lv Kexiang Wang Weiwei Sun Weifeng Liu Ran Yin Yansheng Sun Yukun Gao Tingting You Penggang Yin Carbon Energy AbstractDue to the advantages of cost‐effectiveness and tunable band gap, hole transport layer (HTL)‐free CsPbIXBr3−X carbon‐based inorganic perovskite solar cells (C‐IPSCs) are emerging candidates for both single junction and tandem solar cells. Because of the direct contact between the carbon electrode and the perovskite surface, energy barriers and defects at the interface limit the enhancement of power conversion efficiency (PCE). In this work, we first reported a preparation method of CsPbI2.75Br0.25 HTL‐free C‐IPSCs and developed an effective surface sulfidation regulation (SSR) strategy to promote hole extraction and inhibit non‐radiative recombination of inorganic perovskite by 2‐(thiocyanomethylthio)benzothiazole (TCMTB) surface modification. The introduced S2− anions form strong binding with uncoordinated Pb ions, inhibit the perovskite degradation reaction, and effectively passivate the surface defects. In addition, PbS formed by the SSR strategy constructed a gradient heterojunction, which promoted the arrangement energy levels and enhanced hole extraction. An additional back‐surface field is induced at the interface of perovskite by energy band bending, which increases the open‐circuit voltage (VOC). As a result, the SSR‐based CsPbI2.75Br0.25 HTL‐free C‐IPSCs showed a PCE of 17.88% with a fill factor of 81.56% and VOC of 1.19 V, which was among the highest reported values of CsPbI2.75Br0.25 HTL‐free C‐IPSCs. 10.1002/cey2.586 http://creativecommons.org/licenses/by/4.0/ |
| title | Surface sulfidation constructing gradient heterojunctions for high‐efficiency (approaching 18%) HTL‐free carbon‐based inorganic perovskite solar cells |
| topic | Carbon Energy |
| url | https://onlinelibrary.wiley.com/doi/10.1002/cey2.586 |