Alzahrani Yahya A, Alqahtani Raghad M, Alqarni Raghad A, Alnakhli Jenan R, Anezi Shahad A, Almalki Ibtisam S, Yafi Ghazal S, Alenzi Sultan M, Aljuwayr Abdulaziz, Alessa Abdulmalik M, Alkhaldi Huda, Alanazi Anwar Q, Almalki Masaud, Alkahtani Masfer H
Future Energy Technologies Institute, King Abdulaziz City for Science and Technology (KACST), Riyadh 11442, Saudi Arabia.
Department of Physics, College of Science and Humanities, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Jubail 31441, Saudi Arabia.
Nanomaterials (Basel). 2025 Jun 24;15(13):978. doi: 10.3390/nano15130978.
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 (MAPbBr) cores and tetraoctylammonium lead bromide (tetra-OAPbBr) 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/cm to 26.1 mA/cm, 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.
我们报告了一种用于钙钛矿太阳能电池（PSC）的先进钝化策略，即在反溶剂辅助结晶步骤中引入由甲基溴化铅（MAPbBr）核和四辛基溴化铅（tetra - OAPbBr）壳组成的核壳结构钙钛矿量子点（PQD）。PQD与主体钙钛矿基质之间的外延兼容性能够有效钝化晶界和表面缺陷，从而抑制非辐射复合并促进更高效的电荷传输。在最佳PQD浓度为15 mg/mL时，改性PSC的功率转换效率（PCE）从19.2%显著提高到22.85%。这种提高伴随着器件性能指标的改善，包括开路电压（Voc）从1.120 V提高到1.137 V，短路电流密度（Jsc）从24.5 mA/cm提高到26.1 mA/cm，填充因子（FF）从70.1%提高到77%。通过入射光子到电流效率（IPCE）进行的光谱响应分析表明，在400 - 750 nm波长范围内光响应增强。此外，长期稳定性评估表明，在环境条件下900小时后，PQD钝化的器件保留了其初始PCE的92%以上，优于保留约80%的对照器件。这些发现强调了原位集成PQD作为下一代高效稳定钙钛矿光伏可扩展且有效钝化策略的潜力。
