Si Hybrid Solar Cells with 13% Efficiency via Concurrent Improvement in Optical and Electrical Properties by Employing Graphene Quantum Dots

Meng-Lin Tsai; Wan-Rou Wei; Libin Tang; Hung-Chih Chang; Shih-Hsiang Tai; Po-Kang Yang; Shu Ping Lau; Lih-Juann Chen; Jr-Hau He

doi:10.1021/acsnano.5b05928

Si Hybrid Solar Cells with 13% Efficiency via Concurrent Improvement in Optical and Electrical Properties by Employing Graphene Quantum Dots

ACS Nano. 2016 Jan 26;10(1):815-21. doi: 10.1021/acsnano.5b05928. Epub 2015 Dec 21.

Authors

Meng-Lin Tsai^{1

2}, Wan-Rou Wei¹, Libin Tang³, Hung-Chih Chang¹, Shih-Hsiang Tai¹, Po-Kang Yang¹, Shu Ping Lau³, Lih-Juann Chen², Jr-Hau He¹

Affiliations

¹ Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division, King Abdullah University of Science & Technology (KAUST) , Thuwal 23955-6900, Kingdom of Saudi Arabia.
² Department of Materials Science and Engineering, National Tsing Hua University , Hsinchu 30013, Taiwan ROC.
³ Department of Applied Physics, The Hong Kong Polytechnic University , Hong Kong SAR.

PMID: 26679147
DOI: 10.1021/acsnano.5b05928

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(2) 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.

Keywords: PEDOT:PSS; downconversion; graphene; hybrid solar cell; quantum dot.

Publication types

Research Support, Non-U.S. Gov't