Semitransparent Solar Cells Employing n-Type Graphene on LaVO3

To effectively utilize solar energy, semitransparentsolar cellsare essential in various fields such as building-integrated solarpower generation and portable solar chargers. We report triethylenetetramine(TETA)-doped graphene (Gr) transparent conductive electrode (TCE)-basedLaVO(3) 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 semitransparentsolar cells exhibit the highest 1.45% efficiency and 62% average visibletransmittance at n (D) = 0.2 mM. These resultsindicate that the TETA-Gr/LaVO3 structure not only harvestssolar energy in the ultraviolet-visible region but also exhibitstranslucency, thanks to the thin film. Thanks to its translucent properties,we improved the power conversion efficiency (PCE) to 1.99% by addingan Al reflective mirror to the semitransparent cells. Finally, thedevice's PCE loss is only within 3% for 3000 h in air, suggestinggood durability.

Automated summary

In order to effectively utilize solar energy, it is necessary to have semitransparent solar cells in various fields. This study reports on semitransparent solar cells based on triethylenetetramine(TETA)-doped graphene (Gr) transparent conductive electrode (TCE)-based LaVO(3). By optimizing the Gr TCE with different TETA concentrations, the highest efficiency of 1.45% and average visible transmittance of 62% were achieved at the TETA concentration of 0.2 mM. The TETA-Gr/LaVO3 structure not only harvests solar energy but also exhibits translucency. The addition of an Al reflective mirror further increases the power conversion efficiency (PCE) to 1.99%.