Sun Shaoming, Zha Wusong, Tian Chenyang, Wei Zhixiang, Luo Qun, Ma Chang-Qi, Liu Wuyue, Zhu Xiaozhang
Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
Adv Mater. 2023 Nov;35(46):e2305092. doi: 10.1002/adma.202305092. Epub 2023 Oct 15.
Photovoltaic windows with easy installation for the power supply of household appliances have long been a desire of energy researchers. However, due to the lack of top electrodes that offer both high transparency and low sheet resistance, the development of high-transparency photovoltaic windows for indoor lighting scenarios has lagged significantly behind photovoltaic windows where privacy issues are involved. Addressing this issue, this work develops a solution-processable transparent top electrode using sandwich structure silver nanowires, realizing high transparency in semi-transparent organic solar cells. The wettability and conducting properties of the electrode are improved by a modified hole-transport layer named HP. The semi-transparent solar cell exhibits good see-through properties at a high average visible transmittance of 50.8%, with power conversion efficiency of 7.34%, and light utilization efficiency of 3.73%, which is the highest without optical modulations. Moreover, flexible devices based on the above-mentioned architecture also show excellent mechanical tolerance compared with Ag electrode counterparts, which retains 94.5% of their original efficiency after 1500 bending cycles. This work provides a valuable approach for fabricating solution-processed high transparency organic solar cells, which is essential in future applications in building integrated photovoltaics.
易于安装以用于家用电器供电的光伏窗户长期以来一直是能源研究人员的愿望。然而，由于缺乏兼具高透明度和低表面电阻的顶部电极，用于室内照明场景的高透明度光伏窗户的发展明显落后于涉及隐私问题的光伏窗户。为了解决这个问题，这项工作开发了一种使用三明治结构银纳米线的可溶液加工的透明顶部电极，在半透明有机太阳能电池中实现了高透明度。通过一种名为HP的改性空穴传输层改善了电极的润湿性和导电性能。该半透明太阳能电池在50.8%的高平均可见光透射率下表现出良好的透视性能，功率转换效率为7.34%，光利用效率为3.73%，这是在没有光学调制的情况下的最高值。此外，与基于银电极的同类器件相比，基于上述结构的柔性器件也表现出出色的机械耐受性，在1500次弯曲循环后仍保留其原始效率的94.5%。这项工作为制造可溶液加工的高透明度有机太阳能电池提供了一种有价值的方法，这在未来的建筑集成光伏应用中至关重要。
