材料科学
量子点
兴奋剂
电极
纳米线
光电子学
涂层
纳米技术
电荷(物理)
太阳能电池
光伏系统
电气工程
化学
物理
工程类
物理化学
量子力学
作者
Hye-Jin Lee,Daehee Cho,Chanwoo Lim,Woong Kim,Yoon Hee Jang,Se‐Woong Baek,Byeong−Kwon Ju,Phillip Lee,Hyeonggeun Yu
标识
DOI:10.1021/acsami.3c16468
摘要
Colloidal PbS quantum-dot solar cells (QDSCs) have long suffered from inefficient charge collection near the back-junction due to the lack of p-doping strategy, rendering their bifacial photovoltaic applications unsuccessful. Here, we report highly efficient photocarrier collection in bifacial colloidal PbS QDSCs by exploiting spray-coated silver nanowires (AgNWs) top electrodes. During our spray-coating process, pressurized Ag diffusion occurred toward the active layer, which induced effective p-doping and deep-level passivation. By manipulating the spray pressure, optimum AgNWs’ stacking morphology enabling an appropriate level of Ag diffusion could be achieved, leading to Jsc over 30 mA/cm2 from the conventional n-i-p structure upon light illumination to the film side. The morphological and electrical behaviors of AgNWs according to the spray pressure are comprehensively explained in relation to the device performance. Finally, 50 bifacial cells were fabricated over 49 cm2 sized glass substrate, demonstrating the large-area processability and functionality of the spray-coated AgNWs with the effective back-junction engineering.
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