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We present a highly efficient hybrid heterojunction photovoltaic (PV) cell with a colloidal inorganic nanocrystal (NC) electron donor and an organic electron acceptor. The heterojunction is formed by a thin film of cross-linked PbS NCs and a C60 layer. Compared to the PbS-only PV cell, the heterojunction device has improved the power conversion efficient (PCE) from 1.6 % to 2.2 %. The C60 layer effectively...
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