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Thickness dependence of poly(tryaryl amine) hole transport layer on bulk heterojunction organic solar cells

K. L. USHA KUMARY1, M. PRATHEEK2, T. A. SHAHUL HAMEED3, P. PREDEEP2,*

Affiliation

  1. LBS Centre for Science and Technology, Trivandrum, 695033, India
  2. Laboratory for Molecular Electronics and Photonics, National Institute of Technology, Calicut, 673601, India
  3. Department of Electronics and Communication Engineering, TKM College of Engineering, Kollam, 691005, India

Abstract

Transport layers have a critical role in the performance of bulk heterojunction (BHJ) solar cells. In this work, poly(tryaryl amine) (PTAA) was introduced as the hole transport layer (HTL) in the device with the structure ITO/PTAA/P3HT:PCBM/Al. The electrical carrier transport properties of the devices were studied with PTAA layer in varying thicknesses and spin speed. It has been observed that the PTAA which was coated at a spinning speed of 2000rpm exhibited better performance compared to those spin cast at higher speeds. Impedance measurements with an ac voltage of 10mV amplitude at different bias voltages, were carried and the effect of capacitance, resistance and conductance for a range of frequencies investigated, which is expected to shed light on the possibilities of incorporating more versatile layers in such devices.

Keywords

Carrier concentration, PTAA, Rectification.

Citation

K. L. USHA KUMARY, M. PRATHEEK, T. A. SHAHUL HAMEED, P. PREDEEP, Thickness dependence of poly(tryaryl amine) hole transport layer on bulk heterojunction organic solar cells, Optoelectronics and Advanced Materials - Rapid Communications, 15, 5-6, May-June 2021, pp.278-285 (2021).

Submitted at: June 29, 2020

Accepted at: June 11, 2021