Improving Ultraviolet Responses in Cu2ZnSn(S,Se)4 Thin-Film Solar Cells Using Quantum Dot-Based Luminescent Down-Shifting Layer

Nanomaterials

卷:11

Soo-Kyung Joo¹  JinHyeok Kim²  Junsung Jang²  Mun-Do Park³  Woo-Lim Jeong³  Hoe-Min Kwak³  Dong-Seon Lee³  Jaeyoung Baik³  Jihun Kim⁴  Hyeong-Jin Kim⁴ 

[1] College of Basic and General Education, Dongshin University, 67 Dongshinedae-gil, Naju-si 58246, Jeollanam-do, Korea;

[2] Optoelectronic Convergence Research Center, Department of Materials Science and Engieering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea;

[3] School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Korea;

[4] School of Integrated Technology, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Korea;

关键词: CZTSSe;    thin-film solar cells;    quantum dot;    luminescent down-shifting;   

DOI  :  10.3390/nano11051166

来源: DOAJ

【 摘 要 】

Quantum dot (QD)-based luminescent down-shifting (LDS) layers were deposited on Cu₂ZnSn(S,Se)₄ (CZTSSe) solar cells via the drop-casting method. The LDS layers can easily widen the narrow absorption wavelength regions of single-junction solar cells and enable improvement of the short-circuit current. The optical properties of LDS layers deposited on glass and containing different QD contents were analyzed based on their transmittance, reflectance, and absorbance. The absorber films to be used in the CZTSSe solar cells were determined by X-ray diffraction measurements and Raman spectroscopy to determine their crystal structures and secondary phases, respectively. The completed CZTSSe solar cells with LDS layers showed increased ultraviolet responses of up to 25% because of wavelength conversion by the QDs. In addition, the impact of the capping layer, which was formed to protect the QDs from oxygen and moisture, on the solar cell performance was analyzed. Thus, a maximal conversion efficiency of 7.3% was achieved with the 1.0 mL QD condition; furthermore, to the best of our knowledge, this is the first time that LDS layers have been experimentally demonstrated for CZTSSe solar cells.

【 授权许可】

Unknown