Okamoto Kazuya, Fujita Yutaka, Nishigaya Kosuke, Tanabe Katsuaki
Department of Chemical Engineering, Kyoto University, Nishikyo, Kyoto 615-8510, Japan.
PNAS Nexus. 2023 Mar 14;2(3):pgad067. doi: 10.1093/pnasnexus/pgad067. eCollection 2023 Mar.
Solar cells are a promising optoelectronic device for the simultaneous solution of energy resource and environmental problems. However, their high cost and slow, laborious production process so far severely hinder a sufficient widespread of clean, renewable photovoltaic energy as a major alternative electricity generator. This undesirable situation is mainly attributed to the fact that photovoltaic devices have been manufactured through a series of vacuum and high-temperature processes. Here we realize a poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS)/Si heterojunction solar cell fabricated only in ambient and room temperature conditions from a plain Si wafer, with an over 10% energy conversion efficiency. Our production scheme is based on our finding that PEDOT:PSS photovoltaic layers actively operate even on highly doped Si substrates, which substantially mitigates the condition requirements for electrode implementation. Our approach may pave the way for facile, low-cost, high-throughput solar cell fabrication, useful in various fields even including developing countries and educational sites.
太阳能电池是一种很有前景的光电器件，有望同时解决能源资源和环境问题。然而，到目前为止，其高昂的成本以及缓慢、繁琐的生产过程严重阻碍了清洁、可再生光伏能源作为主要替代发电方式的充分广泛应用。这种不理想的情况主要归因于光伏器件一直是通过一系列真空和高温工艺制造的。在此，我们实现了一种聚（3,4 - 亚乙基二氧噻吩）- 聚（苯乙烯磺酸盐）（PEDOT:PSS）/硅异质结太阳能电池，该电池仅在环境和室温条件下由普通硅片制成，能量转换效率超过10%。我们的生产方案基于我们的发现，即PEDOT:PSS光伏层即使在高掺杂硅衬底上也能有效工作，这大大减轻了电极制作的条件要求。我们的方法可能为简便、低成本、高通量的太阳能电池制造铺平道路，甚至在包括发展中国家和教育场所在内的各个领域都有用。
