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.

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‡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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