Semitransparent Solar Cells Employing n-Type Graphene on LaVO₃

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.

Highly stable semitransparent solar cell employing graphene/WS2/LaVO3 vertical-heterostructure

“…20 Besides, the stability of LaVO 3 -based optoelectronic devices has already been verified under atmospheric conditions as previously reported in the literature. [21][22][23][24] On the other hand, twodimensional (2D) materials such as WS 2 are attracting much attention as optoelectronic devices owing to their strong lightmaterial interactions useful for light absorption, noticeable band gaps, and high electron mobility.…”

Self-powered semitransparent WS2/LaVO3 vertical-heterostructure photodetectors by employing interfacial hexagonal boron nitride

“…On the other hand, LaVO 3 film is easy to manufacture as a thin film due to its excellent light absorption in the range from ultraviolet (UV) to visible light [34][35][36], making it suitable for semitransparent optoelectronic devices [37][38][39]. Additionally, it exhibits a relatively short response time [40].…”

Stability of Silver-Nanowire-Based Flexible Transparent Electrodes under Mechanical Stress

“…Specifically, traditional transistors are heavy and inflexible, but recently reported transistors have been manufactured in lightweight and flexible forms capable of bending and stretching [4][5][6]. Similarly, solar cells, which were traditionally manufactured using rigid inorganic materials, now have lightweight and portable device architectures [7][8][9][10]. One of the strategies that can provide such flexibility and lightness to various optoelectronic components is the adoption of flexible transparent electrodes [11,12].…”