Si
Hybrid Solar Cells with 13% Efficiency <i>via</i> Concurrent
Improvement in Optical and Electrical Properties
by Employing Graphene Quantum Dots
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Abstract
By
employing graphene quantum dots (GQDs) in PEDOT:PSS, we have
achieved an efficiency of 13.22% in Si/PEDOT:PSS hybrid solar cells.
The efficiency enhancement is based on concurrent improvement in optical
and electrical properties by the photon downconversion process and
the improved conductivity of PEDOT:PSS via appropriate incorporation
of GQDs. After introducing GQDs into PEDOT:PSS, the short circuit
current and the fill factor of rear-contact optimized hybrid cells
are increased from 32.11 to 36.26 mA/cm<sup>2</sup> and 62.85% to
63.87%, respectively. The organic–inorganic hybrid solar cell
obtained herein holds the promise for developing photon-managing,
low-cost, and highly efficient photovoltaic devices