Energy Band Alignment by Solution-Processed Aluminum Doping Strategy toward Record Efficiency in Pulsed Laser-Deposited Kesterite Thin-Film Solar Cell - Université de Rennes Accéder directement au contenu
Article Dans Une Revue ACS Applied Materials & Interfaces Année : 2023

Energy Band Alignment by Solution-Processed Aluminum Doping Strategy toward Record Efficiency in Pulsed Laser-Deposited Kesterite Thin-Film Solar Cell

Résumé

Kesterite-based Cu(2)ZnSnS(4) (CZTS) thin-film photovoltaics involve a serious interfacial dilemma, leading to severe recombination of carriers and insufficient band alignment at the CZTS/CdS heterojunction. Herein, an interface modification scheme by aluminum doping is introduced for CZTS/CdS via a spin coating method combined with heat treatment. The thermal annealing of the kesterite/CdS junction drives the migration of doped Al from CdS to the absorber, achieving an effective ion substitution and interface passivation. This condition greatly reduces interface recombination and improves device fill factor and current density. The J(SC) and FF of the champion device increased from 18.01 to 22.33 mA cm(-2) and 60.24 to 64.06%, respectively, owing to the optimized band alignment and remarkably enhanced charge carrier generation, separation, and transport. Consequently, a photoelectric conversion efficiency (PCE) of 8.65% was achieved, representing the highest efficiency in CZTS thin-film solar cells fabricated by pulsed laser deposition (PLD) to date. This work proposed a facile strategy for interfacial engineering treatment, opening a valuable avenue to overcome the efficiency bottleneck of CZTS thin-film solar cells.
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Dates et versions

hal-04061741 , version 1 (07-04-2023)

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Tong Wu, Juguang Hu, Shuo Chen, Zhuanghao Zheng, Michel Cathelinaud, et al.. Energy Band Alignment by Solution-Processed Aluminum Doping Strategy toward Record Efficiency in Pulsed Laser-Deposited Kesterite Thin-Film Solar Cell. ACS Applied Materials & Interfaces, 2023, 15 (11), pp.14291-14303. ⟨10.1021/acsami.2c22174⟩. ⟨hal-04061741⟩
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