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| Home > Publications database > Cooperative Dipole Engineering Unlocks 92.8% Shockley–Queisser Voltage Limit in Wide-Bandgap Perovskites for Tandem Photovoltaics > print |
| 001 | 1052856 | ||
| 005 | 20260223122507.0 | ||
| 024 | 7 | _ | |a 10.1021/acsenergylett.5c02738 |2 doi |
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| 100 | 1 | _ | |a Ji, Sang-Geun |0 P:(DE-HGF)0 |b 0 |
| 245 | _ | _ | |a Cooperative Dipole Engineering Unlocks 92.8% Shockley–Queisser Voltage Limit in Wide-Bandgap Perovskites for Tandem Photovoltaics |
| 260 | _ | _ | |a Washington, DC |c 2026 |b American Chemical Society |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a Wide-bandgap (WBG) perovskite solar cells (PSCs, Eg ≃ 1.67 eV) still suffer from pronounced open-circuit-voltage (VOC) deficits. Here, we report a synergistic surface-passivation strategy that coassembles a dipolar quaternary-ammonium salt, acetylcholine chloride (ACCl), with an electron-rich long-chain alkylammonium halide, n-octylammonium iodide (OAI). A mixed ACCl:OAI treatment reconstructs the perovskite surface, lowers surface-trap density, and aligns the valence band with the hole-transport layer. Consequently, the champion WBG PSC delivers VOC = 1.29 V, JSC = 20.0 mA cm–2, FF = 82.8%, and PCE = 21.27%, corresponding to 92.8% of the Shockley–Queisser voltage limit. When integrated as the top absorber in a monolithic n-i-p perovskite/p-type Si tandem, the passivated WBG cell contributed to a PCE of 26.8% with a VOC of 1.91 V. These results reveal that cooperative defect passivation and energy-level engineering are both essential to unlock the full voltage potential of WBG perovskites. |
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| 700 | 1 | _ | |a Noh, Eunseo |0 P:(DE-HGF)0 |b 1 |
| 700 | 1 | _ | |a Kim, Jongbeom |0 P:(DE-HGF)0 |b 2 |
| 700 | 1 | _ | |a Duan, Weiyuan |0 P:(DE-Juel1)169946 |b 3 |
| 700 | 1 | _ | |a Kang, Bong Joo |0 P:(DE-HGF)0 |b 4 |
| 700 | 1 | _ | |a Lee, Yonghui |0 P:(DE-HGF)0 |b 5 |
| 700 | 1 | _ | |a Ding, Kaining |0 P:(DE-Juel1)130233 |b 6 |u fzj |
| 700 | 1 | _ | |a Seok, Sang Il |0 P:(DE-HGF)0 |b 7 |e Corresponding author |
| 773 | _ | _ | |a 10.1021/acsenergylett.5c02738 |g Vol. 11, no. 1, p. 442 - 450 |0 PERI:(DE-600)2864177-2 |n 1 |p 442 - 450 |t ACS energy letters |v 11 |y 2026 |x 2380-8195 |
| 856 | 4 | _ | |y Published on 2025-12-22. Available in OpenAccess from 2026-12-22. |u https://juser.fz-juelich.de/record/1052856/files/Post-Print.docx |
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