Abstract

The effects of postdeposition annealing temperature (125°C–200°C) toward optical, morphological, and electrical characteristics of poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(1,4-phenylene)] end capped with dimethylphenyl group deposited on indium tin oxide glass substrates were investigated. Green and red-infrared photoluminescence emissions, originating from П-conjugation aggregates and keto-type defects did not attenuate the intensity of the blue emission peak. This suggested that the aggregates and defects might serve as local traps for radiative recombination. In samples annealed at 125°C–175°C, a decreasing optical energy gap ($E_g$) that decreased barrier height as well as an increasing amount of traps have increased current conduction via thermionic emission and trap-assisted tunneling. Nonetheless, an acquisition of the largest $E_g$ and amount of traps testified that thermionic emission was dominating current conduction, surpassing trap-assisted tunneling in samples annealed at 200°C.

© 2016 Optical Society of America

Effect of the annealing temperature on structural, morphological, and nonlinear optical properties of TeO₂ thin films used for efficient THz generation

M. Mahendar, R. N. Vamsi Krishna, and A. K. Chaudhary
Appl. Opt. 62(10) 2394-2402 (2023)

Circular dichroism, surface-enhanced Raman scattering, and spectroscopic ellipsometry studies of chiral polyfluorene-phenylene films

Geon Joon Lee, Eun Ha Choi, Won Kyu Ham, Chang Kwon Hwangbo, Min Ju Cho, and Dong Hoon Choi
Opt. Mater. Express 6(3) 767-781 (2016)

Investigation of thermal annealing of optical properties and residual stress of ion-beam-assisted TiO₂ thin films with different substrate temperatures

Cheng-Chung Lee, Hsi-Chao Chen, and Cheng-Chung Jaing
Appl. Opt. 45(13) 3091-3096 (2006)

Effect of reannealing temperature on characteristics of nanocrystalline Sn-doped In₂O₃ thin films for organic photovoltaic cell applications

Hamed Reza Modayemzadeh, Mohsen Ghasemi Varnamkhasti, and Hosein Zabolian
Appl. Opt. 52(15) 3444-3450 (2013)

Effect of annealing temperature on the structure and properties of vanadium oxide films

Yueyan Liu, Juncheng Liu, Yuanbao Li, Danping Wang, Lin Ren, and Kaishun Zou
Opt. Mater. Express 6(5) 1552-1560 (2016)