Journal
CHEMICAL PHYSICS LETTERS
Volume 781, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.cplett.2021.138963
Keywords
DSSCs; Porphyrin; TCSPC; solvent and LHE
Funding
- SERB Research Scientists scheme [SB/SRS/2018-2019-05/CS]
- SERB TARE project [TAR/2018/000458]
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The role of immersion solvents on light harvesting efficiency and photoinduced electron injection in porphyrin/TiO2 interfaces was investigated. The choice of t-BuOH:ACN solvent was found to result in long-lived electrons in H2MP/TiO2 devices.
In this work, the role of immersion solvents on light harvesting efficiency, photoinduced electron injection and photovoltaic properties of porphyrin/TiO2 have been investigated. Time resolved fluorescence technique was used to characterize the kinetics of electron injection at the porphyrin/TiO2 interface. The results show that electron injection from photoexcited porphyrin to the conduction band of TiO2 is highly sensitive to the nature of the solvent used during self-assembly of the TiO2-porphyrin interface. Based on the findings, the t-BuOH:ACN solvent is suitable for achieving long lived electrons in a H2MP/TiO2 device.
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