Improvement of inverted type organic solar cells performance by incorporating Mg dopant into hydrothermally grown ZnO nanorod arrays

•Mg-doped ZnO nanorod arrays were synthesized by hydrothermal method.•Growth of ZnO nanorods was strongly correlated to Mg concentration.•The PCE of device with optimum Mg concentration increased by 225%.•The mechanism of PCE improvement by Mg doping was revealed. The Mg concentration dependence of...

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