Tandem photovoltaic-photoelectrochemical GaAs/InGaAsP-WO 3 /BiVO 4 device for solar hydrogen generation

Sonya Kosar, Yuriy Pihosh, Ivan Turkevych, Kazuma Mawatari, Jin Uemura, Yutaka Kazoe, Kikuo Makita, Takeyoshi Sugaya, Takuya Matsui, Daisuke Fujita, Masahiro Tosa, Yaroslav M. Struk, Michio Kondo, Takehiko Kitamori

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

We demonstrated highly efficient solar hydrogen generation via water splitting by photovoltaic-photoelectrochemical (PV-PEC) tandem device based on GaAs/InGaAsP (PV cell) and WO 3 /BiVO 4 core/shell nanorods (PEC cell). We utilized extremely thin absorber (ETA) concept to design the WO 3 /BiVO 4 core/shell heterojunction nanorods and obtained the highest efficiencies of generation, separation and transfer of the photoinduced charge carriers that are possible for the WO 3 /BiVO 4 material combination. The PV-PEC tandem shows stable water splitting photocurrent of 6.56mA&cm%2 under standard AM1.5G solar light that corresponds to the record solar-to-hydrogen (STH) conversion efficiency of 8.1%.

Original languageEnglish
Article number04ES01
JournalJapanese journal of applied physics
Volume55
Issue number4
DOIs
Publication statusPublished - 2016 Apr 1
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Tandem photovoltaic-photoelectrochemical GaAs/InGaAsP-WO <sub>3</sub> /BiVO <sub>4</sub> device for solar hydrogen generation'. Together they form a unique fingerprint.

  • Cite this

    Kosar, S., Pihosh, Y., Turkevych, I., Mawatari, K., Uemura, J., Kazoe, Y., Makita, K., Sugaya, T., Matsui, T., Fujita, D., Tosa, M., Struk, Y. M., Kondo, M., & Kitamori, T. (2016). Tandem photovoltaic-photoelectrochemical GaAs/InGaAsP-WO 3 /BiVO 4 device for solar hydrogen generation Japanese journal of applied physics, 55(4), [04ES01]. https://doi.org/10.7567/JJAP.55.04ES01