钝化
材料科学
光伏
钙钛矿(结构)
光电子学
量子点
能量转换效率
量子效率
开路电压
载流子寿命
外延
光伏系统
纳米技术
化学工程
电压
硅
生态学
图层(电子)
工程类
物理
生物
量子力学
作者
Yahya Alzahrani,Raghad Alqahtani,Raghad A. Alqarni,Jenan R. Alnakhli,Shahad A. Anezi,Ibtisam S. Almalki,Ghazal S. Yafi,Sultan M. Alenzi,Abdulaziz Aljuwayr,Abdulmalik M. Alessa,Huda Alkhaldi,Anwar Q. Alanazi,Masaud Almalki,Masfer Alkahtani
出处
期刊:Nanomaterials
[Multidisciplinary Digital Publishing Institute]
日期:2025-06-24
卷期号:15 (13): 978-978
被引量:4
摘要
We report an advanced passivation strategy for perovskite solar cells (PSCs) by introducing core–shell structured perovskite quantum dots (PQDs), composed of methylammonium lead bromide (MAPbBr3) cores and tetraoctylammonium lead bromide (tetra-OAPbBr3) shells, during the antisolvent-assisted crystallization step. The epitaxial compatibility between the PQDs and the host perovskite matrix enables effective passivation of grain boundaries and surface defects, thereby suppressing non-radiative recombination and facilitating more efficient charge transport. At an optimal PQD concentration of 15 mg/mL, the modified PSCs demonstrated a remarkable increase in power conversion efficiency (PCE) from 19.2% to 22.85%. This enhancement is accompanied by improved device metrics, including a rise in open-circuit voltage (Voc) from 1.120 V to 1.137 V, short-circuit current density (Jsc) from 24.5 mA/cm2 to 26.1 mA/cm2, and fill factor (FF) from 70.1% to 77%. Spectral response analysis via incident photon-to-current efficiency (IPCE) revealed enhanced photoresponse in the 400–750 nm wavelength range. Additionally, long-term stability assessments showed that PQD-passivated devices retained more than 92% of their initial PCE after 900 h under ambient conditions, outperforming control devices which retained ~80%. These findings underscore the potential of in situ integrated PQDs as a scalable and effective passivation strategy for next-generation high-efficiency and stable perovskite photovoltaics.
科研通智能强力驱动
Strongly Powered by AbleSci AI