[21a-D903-1~10] CS.13 Code-sharing Session of 12.5 & 13.9 & 16.3

9:15 AM - 9:30 AM JST(12:15 AM - 12:30 AM UTC)English Presentation

[21a-D903-2] All perovskite tandem solar cells employing indium zinc oxide interconnect

〇(PC)Gaurav Kapil^1,2, Yasuhiro Fujiwara¹, Qing Shen¹, Hiroshi Segawa², Shuzi Hayase¹ (1.Uni. of Electr.Comm., 2.Uni. of Tokyo)

Keywords:

Tandem solar cells,Wide bandgap solar cells,Interconnecting layer

All perovskite tandem solar cells (APTSCs) are now showing power conversion efficiencies (PCEs) more than the highest reported single-junction perovskite and silicon solar cells [1,2]. The rapid rise in the performance of APTSC can be ascribed to the improvement in the performances of both top (wide bandgap, WBG) and bottom (narrow bandgap, NBG) cells. Recently, the focus has been on the reduction of halide segregation and improvement of open circuit voltage (Voc) in WBG cells which led to an immense increase in Voc of APTSC to 2.2V [2,3]. We noticed that most of the recent reports on efficient APTSCs utilize SnOx (prepared by atomic layer deposition) coated with Au (1-2nm) as an interlayer. However, the optical loss due to the use of Au nanoparticles can’t be ignored. Therefore, in this work, we focused on the preparation of indium oxide doped with zinc oxide (IZO) as an interconnecting layer in place of Au nanoparticles to reduce the optical loss and improvement of facile hole and electron recombination at the SnOx layer.
References
1. https://www.nrel.gov/pv/cell-efficiency.html, NREL chart accessed on 6^th June.
2. Q. Jiang and K. Zhu et al, Compositional texture engineering for highly stable
wide-bandgap perovskite solar cells, Science, 378, 1295–1300 (2022).
3. H. Chen and E. H. Sargent et al, Regulating surface potential maximizes
voltage in all-perovskite tandems, Nature, 613, 676–681 (2023).