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New Organic Dye Based on a 3,6‐Disubstituted Carbazole Donor for Efficient Dye‐Sensitized Solar Cells
Author(s) -
Lee Woochul,
Cho Nara,
Kwon Jongchul,
Ko Jaejung,
Hong JongIn
Publication year - 2012
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201100661
Subject(s) - carbazole , dye sensitized solar cell , nanocrystalline material , electrolyte , open circuit voltage , materials science , short circuit , solar cell , irradiation , molar mass , photochemistry , energy conversion efficiency , photovoltaic system , organic dye , chemical engineering , analytical chemistry (journal) , chemistry , optoelectronics , nanotechnology , voltage , organic chemistry , electrode , electrical engineering , physics , engineering , nuclear physics , composite material , polymer
We have synthesized and characterized four organic dyes ( 9 , 10 , H1 , H2 ) based on a 3,6‐disubstituted carbazole donor as sensitizers in dye‐sensitized solar cells . These dyes have high molar extinction coefficients and energy levels suitable for electron transfer from an electrolyte to nanocrystalline TiO 2 particles. Under standard air mass 1.5 global (AM 1.5 G) solar irradiation, a device using dye H4 exhibits a short‐circuit current density ( J sc ) of 13.7 mA cm −2 , an open‐circuit voltage ( V oc ) of 0.68 V, a fill factor ( FF ) of 0.70, and a calculated efficiency of 6.52 %. This performance is comparable to that of a reference cell based on N719 (7.30 %) under the same conditions. After 1000 hours of visible‐light soaking at 60 °C, the overall efficiency remained at 95 % of the initial value.
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