Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 1, Issue 35, Pages 10524-10531Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ta11095h
Keywords
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Funding
- Marie Curie International Incoming Fellowship [PIIF-GA-2008-220272]
- Thailand Research Fund-Master Research Grants-Window II [TRF-MRG-WII 525S012]
- Integrated Innovation Academic Center: IIAC Chulalongkorn University Centenary Academic Development Project [CU56-EN14]
- Graduate School of Chulalongkorn University
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A novel porphyrin-triarylamine compound was synthesized to serve as a photosensitizer in bulk heterojunction solar cells (BHJ-OSCs). Based on cyclic voltammetric analysis, the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels of the target porphyrin trimer were determined to be at -5.4 and -3.5 eV versus vacuum, respectively, and compared with those of other materials used for the construction of the BHJ-OSCs. Absorption and emission spectra of the film of the target porphyrin trimer were in good agreement with those of its solution. The charge transfer in a blended film of the porphyrin-triarylamine compound with phenyl-C-61-butyric acid methyl ester (PCBM) was proven possible by photoluminescence measurements. The energy conversion efficiency of the BHJ-OSCs based on the target compound depended strongly on the donor : acceptor weight ratio and the thickness of the organic layer. Surface nanomorphologies of the films with different donor : acceptor ratios and thickness were investigated by atomic force microscopy (AFM). The short circuit current density (J(SC)) up to 2.06 mA cm(-2) was obtained from the BHJ-OSC fabricated herein.
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