Property Modulation of Graphene Oxide Incorporated with TiO2 for Dye-Sensitized Solar Cells

被引：12

作者：

Singh, Amanpal ^{[1
]}

Saini, Yogesh Kumar ^{[1
]}

Kumar, Anuj ^{[2
]}

Gautam, Sanjeev ^{[3
]}

Kumar, Dinesh ^{[4
]}

Dutta, Viresh ^{[5
]}

Lee, Han-koo ^{[6
]}

Lee, Jongsu ^{[7
]}

Swami, Sanjay Kumar ^{[7
]}

机构：

[1] Univ Rajasthan, Dept Phys, Jaipur 302004, India

[2] J C Bose Univ Sci & Technol, Dept Phys, YMCA, Faridabad 121006, Haryana, India

[3] Panjab Univ, Dr S S Bhatnagar Univ Inst Chem Engn & Technol, Adv Funct Mat Lab, Chandigarh 160014, India

[4] Gurugram Univ, Gurugram 122003, Haryana, India

[5] Indian Inst Technol Delhi, Dept Energy Sci & Engn, Photovolta Lab, New Delhi 110016, India

[6] POSTECH, Pohang Accelerator Lab, Pohang 37673, South Korea

[7] Sunchon Natl Univ, Dept Adv Components & Mat Engn, Sunchon 57922, South Korea

来源：

ACS OMEGA | 2022年 / 7卷 / 48期

关键词：

CHARGE-TRANSPORT; BAND-GAP; GRAPHITE;

D O I：

10.1021/acsomega.2c05637

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Graphene oxide (GO) nano-powder is synthesized by the modified Hummer's method, and further thin films are deposited by using the water solution of GO through spin-coating. These films are thermally reduced along with the synthesized GO nano-powder at 50 to 200 degrees C in a high vacuum. Microstructural, electrical, and optical properties are expectedly controlled by thermal reduction. The electronic properties of GO are investigated by X-ray photoelectron spectroscopy and near-edge X-ray absorption fine structure. The reduction is confirmed by Raman spectroscopy. The work function and band gap of GO are tuned with the thermal reduction. The changes in properties of GO are not linear, and anomalous changes are observed for the reduction around 150 degrees C. Pristine and reduced GO nano-powder is incorporated into TiO2 paste to be the photoanode for dye-sensitized solar cells (DSSCs). It is observed that the performance of the fabricated cells is significantly enhanced for the GO reduced at 150 degrees C, and the cell exhibited a significant increment of similar to 23% for the power conversion efficiency in comparison to DSSC based on an unmodified TiO2 photoanode.

引用

页码：44170 / 44179

页数：10