My experiment needs to measure the IV curve of photocatalysts. The experiment was designed using ITO glass, TiO2, PEDOT-PSS, and silver paste to fabricate a photovoltaic device. I am not sure if I make a correct "sandwich" system. Due to the fact, I need to test the photocurrent efficiency of the photocatalyst, do I make TiO2 as the first layer (this layer also will be irradiated by a solar light), and the second layer is PEDOT-PSS, and then silver paste? After the device is fabricated, where could I contact to electrode? Contact ITO glass and silver paste? Or should both sides contact ITO glass?
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