DataVXACS Energy LettersPaper
journal article·2017-09-08

6.5% Certified Efficiency Sb2Se3 Solar Cells Using PbS Colloidal Quantum Dot Film as Hole-Transporting Layer

Chao Chen, Liang Wang, Liang Gao, Dahyun Nam, Dengbing Li, Kanghua Li, Yang Zhao, Cong Ge, Hyeonsik Cheong, Huan Liu, Haisheng Song, Jiang Tang

ACS Energy Letters· Volume 2· Issue 9
Publisher page
Source abstract

Abstract

Sb 2 Se 3 is a promising candidate for thin-film photovoltaics, with a suitable band gap, benign grain boundaries, Earth-abundant and nontoxic constituents, and excellent stability. However, the low doping density (10 13 cm –3 ) of Sb 2 Se 3 absorber and back contact barrier limit its efficiency. Here we introduced a PbS colloidal quantum dot (CQD) film as the hole-transporting layer (HTL) to construct a n-i-p configured device and overcame these problems. Through simulation-guided optimization, we have significantly improved the efficiency of a Sb 2 Se 3 thin-film solar cell to a new certified record of 6.5%. The PbS CQD HTL not only minimized carrier recombination loss at the back contact and boosted carrier collection efficiency but also contributed photocurrent by its own near-infrared absorption. Furthermore, these n-i-p devices also demonstrated improved device uniformity, achieving 6.39% in a 1.02 cm 2 device.
Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materials

OpenAlex topics: Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films · Perovskite Materials and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, Hubei, PR China

School of Optical and Electronic Information, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, Hubei, PR China

Shenzhen R&D Center of Huazhong University of Science and Technology, Shenzhen 518000, PR China

Department of Physics, Sogang University, Seoul 04107, Korea

Funding

Ministry of Science and Technology of the People's Republic of China · Korea Institute of Energy Technology Evaluation and Planning · National Natural Science Foundation of China · Special Fund for Strategic New Development of Shenzhen

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