材料科学
光电阴极
串联
半导体
光电子学
钙钛矿(结构)
带隙
纳米技术
硅
能量转换效率
分解水
光伏系统
钙钛矿太阳能电池
太阳能电池
化学工程
光催化
催化作用
电气工程
复合材料
电子
工程类
化学
物理
量子力学
生物化学
作者
Siva Krishna Karuturi,Heping Shen,Astha Sharma,Fiona J. Beck,Purushothaman Varadhan,Parvathala Reddy Narangari,Doudou Zhang,Yimao Wan,Jr‐Hau He,Hark Hoe Tan,Chennupati Jagadish,Kylie Catchpole
标识
DOI:10.1002/aenm.202000772
摘要
Abstract Realizing solar‐to‐hydrogen (STH) efficiencies close to 20% using low‐cost semiconductors remains a major step toward accomplishing the practical viability of photoelectrochemical (PEC) hydrogen generation technologies. Dual‐absorber tandem cells combining inexpensive semiconductors are a promising strategy to achieve high STH efficiencies at a reasonable cost. Here, a perovskite photovoltaic biased silicon (Si) photoelectrode is demonstrated for highly efficient stand‐alone solar water splitting. A p + nn + ‐Si/Ti/Pt photocathode is shown to present a remarkable photon‐to‐current efficiency of 14.1% under biased condition and stability over three days under continuous illumination. Upon pairing with a semitransparent mixed perovskite solar cell of an appropriate bandgap with state‐of‐the‐art performance, an unprecedented 17.6% STH efficiency is achieved for self‐driven solar water splitting. Modeling and analysis of the dual‐absorber PEC system reveal that further work into replacing the noble‐metal catalyst materials with earth‐abundant elements and improvement of perovskite fill factor will pave the way for the realization of a low‐cost high‐efficiency PEC system.
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