I am currently working on perovskite based photoelectrodes, but I do not want to replace the counter electrodes including Ag, Au, will it have serious issue in the PEC performance?
Quite the opposite of what you would expect. However, it is preferable to use Gold, Au, and Indem, In as alternative electrodes, rather than the solar cells that contain oxide layers such as ITO, SiO2 and TiO2...etc. The thermal evaporation method is mainly used to prepare the oxide films such as SiO2 and TiO2 and to make the electrodes for perovskite solar cells. For example, As an electron transport layer (ETL) of regular-structure perovskite solar cells (PSCs), titanium oxide (TiO2) is widely utilized; However, it suffers from fundamental pitfalls like smaller atomic mobility and high trap state density. Altering TiO2's surface chemistry has proven to be simple and effective in optimizing main electron-transport characteristics, thus increasing the efficiency of the solar system.
Electrodes play crucial role in the fabrication of Opto-electronic devices (particularly in perovskite based devices). One has to opt electrode material(s) wisely. For example, Silver electrode reacts with methyl ammonium lead iodide and degrades it (and forms AgI2). However, Gold would be better option in case of methyl ammonium lead iodide .
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