Developing low-cost and stable metal electrodes is crucial for mass production of perovskite solar cells (PSCs). As an earth-abundant element, Cu becomes an alternative candidate to replace noble metal electrodes such as Au and Ag, due to its comparable physiochemical properties with simultaneously good stability and low cost. However, the undesirable band alignment associated with the device architecture impedes the exploration of efficient Cu-based n-i-p PSCs. To solve this problem, researchers in China investigated the energy-level difference at different interfaces and offered a potential path forward to achieve more efficient n-i-p PSCs with a Cu electrode.
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Source: Phys.org