Semitransparent Solar Cells Employing n-Type Graphene on LaVO3

Dong Hee Shin; Dae Ho Jung; Hosun Lee

doi:10.1021/acsomega.3c00598

Semitransparent Solar Cells Employing n-Type Graphene on LaVO₃

ACS Omega. 2023 May 15;8(21):18695-18701. doi: 10.1021/acsomega.3c00598. eCollection 2023 May 30.

Authors

Dong Hee Shin¹, Dae Ho Jung², Hosun Lee²

Affiliations

¹ Department of Smart Sensor Engineering, Andong National University, Andong, Gyeongbuk 36729, Republic of Korea.
² Department of Applied Physics, Institute of Natural Sciences, and Integrated Education Institute for Frontier Science and Technology (BK21 Four), Kyung Hee University, Yongin 17104, Republic of Korea.

Abstract

To effectively utilize solar energy, semitransparent solar cells are essential in various fields such as building-integrated solar power generation and portable solar chargers. We report triethylenetetramine (TETA)-doped graphene (Gr) transparent conductive electrode (TCE)-based LaVO₃ semitransparent solar cells. To optimize the Gr TCE, we varied the TETA molar concentration (n_D) from 0.1 to 0.3 mM. TETA-doped Gr (TETA-Gr)/LaVO₃ semitransparent solar cells exhibit the highest 1.45% efficiency and 62% average visible transmittance at n_D = 0.2 mM. These results indicate that the TETA-Gr/LaVO₃ structure not only harvests solar energy in the ultraviolet-visible region but also exhibits translucency, thanks to the thin film. Thanks to its translucent properties, we improved the power conversion efficiency (PCE) to 1.99% by adding an Al reflective mirror to the semitransparent cells. Finally, the device's PCE loss is only within 3% for 3000 h in air, suggesting good durability.