Nuclear Techniques ›› 2016, Vol. 39 ›› Issue (2): 20102-020102.doi: 10.11889/j.0253-3219.2016.hjs.39.020102


Influence of thermal annealing on microcstructure of diketopyrrolopyrrole-containing oligothiophene (SMDPPEH) thin film

YANG Dan1,3, LI Haidong1,2, ZHANG Jidong3   

  1. 1 School of Chemical Engineering, Changchun University of Technology, Changchun 130012, China;
    2 School of Material and Textile Engineering, Jiaxing University, Jiaxing 314001, China;
    3 State Key Lab of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  • Received:2015-11-11 Revised:2015-12-03 Online:2016-02-10 Published:2016-02-17
  • Supported by:

    Supported by the National Natural Science Foundation of China (No.U1332116) First author: YANG Dan, female, born in 1989, graduated from Jilin Institute of Chemical Technology in 2013, master student of Changchun University of Technology, focusing on polymer thin film crystalline form


Background: Thermal annealing will enhance the performance of diketopyrrolopyrrole-containing oligothiophene (SMDPPEH) based solar cells. However, its mechanism is unclear. Purpose: We investigated the variation of SMDPPEH thin film during the thermal annealing. Methods: The SMDPPEH thin film was spin-coated from chlorobenzene solution and characterized by ultraviolet-visible spectrophotometry (UV-VIS) absorption spectra and grazing incidence X-ray diffraction (GIXRD). Results: The absorption maximum (λmax) peaks of the annealed SMDPPEH thin film were at 100℃ and above blue-shifted. The GIXRD results exhibited that the intensities of (100) diffraction peaks were enhanced with increasing annealing temperatures and there was a small change in shape from dot to arc when annealing temperature was equal to or higher than 100℃ for SMDPPEH thin film. Conclusion: These results indicate that a phase transition is present in SMDPPEH when the annealing temperature is up to 100℃ and the crystallinity of all the films improved with the increase of annealing temperature.

Key words: SMDPPEH thin film, Phase transition, Thermal annealing

CLC Number: 

  • TL99