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B.W. thanks the NSF ConvEne IGERT program for financial support. C.K. is supported by the Office of Naval Research. T.QN. thanks the Camille Dreyfus Teacher-Scholar Awards and the Alfred P. Sloan Foundation program for the financial support. X.H. and A.S. acknowledge that this publication was partially based on work supported by the Center for Advanced Molecular Photovoltaics (CAMP) (Award KUS-C1-015-21), made by King Abdullah University of Science and Technology (KAUST).