Enhanced photocurrent production by bio-dyes of photosynthetic macromolecules on designed TiO2 film

Scientific Reports
Daoyong YuFang Huang

Abstract

The macromolecular pigment-protein complex has the merit of high efficiency for light-energy capture and transfer after long-term photosynthetic evolution. Here bio-dyes of A. platensis photosystem I (PSI) and spinach light-harvesting complex II (LHCII) are spontaneously sensitized on three types of designed TiO2 films, to assess the effects of pigment-protein complex on the performance of bio-dye sensitized solar cells (SSC). Adsorption models of bio-dyes are proposed based on the 3D structures of PSI and LHCII, and the size of particles and inner pores in the TiO2 film. PSI shows its merit of high efficiency for captured energy transfer, charge separation and transfer in the electron transfer chain (ETC), and electron injection from FB to the TiO2 conducting band. After optimization, the best short current (JSC) and photoelectric conversion efficiency (η) of PSI-SSC and LHCII-SSC are 1.31 mA cm(-2) and 0.47%, and 1.51 mA cm(-2) and 0.52%, respectively. The potential for further improvement of this PSI based SSC is significant and could lead to better utilization of solar energy.

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Citations

Feb 23, 2020·Photosynthesis Research·Sebastian SzewczykKrzysztof Gibasiewicz
Feb 27, 2020·Scientific Reports·Martha I Ortiz-TorresAndrés Fernando González Barrios
Mar 3, 2020·Photosynthesis Research·S SzewczykK Gibasiewicz
Jun 17, 2020·Advanced Science·Daniel N RoxbyYu-Cheng Chen
Dec 12, 2019·Biochimica Et Biophysica Acta. Bioenergetics·Sebastian SzewczykKrzysztof Gibasiewicz
Jun 10, 2015·Journal of the American Chemical Society·Olga E Castañeda OcampoRyan C Chiechi
Feb 17, 2018··Mike BernierJonathan F. Holzman

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Methods Mentioned

BETA
scanning electron microscopy
light scattering
fluorescence spectrometry

Software Mentioned

PyMOL

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