Open AccessAnnealing treatment effects on the performances of solar cells based on different solvent blend systems
Author(s) -
YU Huang-zhong,
Zhou Xiaoming,
Deng Jun-Yu
Publication year - 2011
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.60.077206
Subject(s) - chlorobenzene , materials science , solvent , annealing (glass) , energy conversion efficiency , boiling point , solar cell , absorption spectroscopy , chemical engineering , short circuit , open circuit voltage , organic solar cell , analytical chemistry (journal) , photochemistry , optoelectronics , optics , organic chemistry , composite material , voltage , chemistry , quantum mechanics , engineering , polymer , physics , catalysis
The solar cells based on different solvent blends of poly(3-hexylthiophene) (P3HT) and -phenyl C61-butyric acid methyl ester (PCBM) as acceptors are fabricated. Annealing treatment effects on the performances of solar cells based on different solvent blend systems are analyzed by UV-vis absorption spectroscopy and photoluminescence (PL) spectroscopy. The results show that high boiling point solvent leads to an enhanced P3HT ordering in the P3HT:PCBM blend system, and causes an increased incident light absorption and PL spectrum, which contributes to the enhancement of device performance. After 130 ℃ thermal annealing, The UV-Vis absorption, PL spectrum and the performance of the device are further enhanced. The performance of the device prepared with low boiling point chloroform solvent increases obviously after thermal annealing. The solar cell prepared with chlorobenzene solvent after 130 ℃ thermal annealing achieves an open circuit voltage(Voc)of 0.57 V, short circuit current density(Isc)of 8.74 mA/cm2, fill factor (FF ) of 59.2% and power conversion efficiency (PCE) of 2.95% under 100 mW/cm2 air-mass 1.5 solar simulator illumination.