Si Hybrid Solar Cells with 13% Increase by Employing Graphene Quantum Dots



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/cm2 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.


‡Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan ROC

§Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong SAR

Meng-Lin Tsai†‡, Wan-Rou Wei†, Libin Tang§, Hung-Chih Chang†, Shih-Hsiang Tai†, Po-Kang Yang†, Shu Ping Lau§, Lih-Juann Chen*‡ and Jr-Hau He*†


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