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primary topic: A bacteriorhodopsin-based biohybrid solar cell using carbon-based electrolyte and cathode components

A bacteriorhodopsin-based biohybrid solar cell using carbon-based electrolyte and cathode components
type: AcademicArticle
type: Article
abstract: There is currently a high demand for energy production worldwide, mainly producing renewable and sustainable energy. Bio-sensitized solar cells (BSCs) are an excellent option in this field due to their optical and photoelectrical properties developed in recent years. One of the biosensitizers that shows promise in simplicity, stability and quantum efficiency is bacteriorhodopsin (bR), a photoactive, retinal-containing membrane protein. In the present work, we have utilized a mutant of bR, D96N, in a photoanode-sensitized TiO2 solar cell, integrating low-cost, carbon-based components, including a cathode composed of PEDOT (poly(3,4-ethylenedioxythiophene) functionalized with multi-walled carbon nanotubes (CNT) and a hydroquinone/benzoquinone (HQ/BQ) redox electrolyte. The photoanode and cathode were characterized morphologically and chemically (SEM, TEM, and Raman). The electrochemical performance of the bR-BSCs was investigated using linear sweep voltammetry (LSV), open circuit potential decay (VOC), and impedance spectroscopic analysis (EIS). The champion device yielded a current density (JSC) of 1.0 mA/cm2, VOC of -669 mV, a fill factor of ~24 %, and a power conversion efficiency (PCE) of 0.16 %. This bR device is one of the first bio-based solar cells utilizing carbon-based alternatives for the photoanode, cathode, and electrolyte. This may decrease the cost and significantly improve the device's sustainability.
date: 2023-11
volume: 1864
issue: 4
author list: authors
type: EPrint
type: ArticleEPrint
is part of: repository

Elsevier BV
type: Organization

Biochim. Biophys. Acta Bioenerg.
type: Collection

Ashok Mulchandani
type: Person
given name: Ashok
family name: Mulchandani

E Senthil Prasad
type: Person
given name: E Senthil
family name: Prasad

Venkatesan Renugopalakrishnan
type: Person
given name: Venkatesan
family name: Renugopalakrishnan

Ricardo Starbird
type: Person
given name: Ricardo
family name: Starbird

Claudia C Villarreal
type: Person
given name: Claudia C
family name: Villarreal

Barry D Bruce
type: Person
given name: Barry D
family name: Bruce

Christopher Espinoza-Araya
type: Person
given name: Christopher
family name: Espinoza-Araya

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primary topic: A bacteriorhodopsin-based biohybrid solar cell using carbon-based electrolyte and cathode components