ITO-Free Flexible Indoor Organic Solar Cells using PEDOT: PSS Conductive Electrode Demonstrating PCE over 10% On a Polyethylene Naphthalate (PEN) Substrate
DOI:
https://doi.org/10.31224/2575Keywords:
organic photovoltaics, ITO-free, solution-processed, flexibility, dim lighting conditionsAbstract
Solution-processed flexible organic photovoltaics (OPVs) have gained tremendous popularity worldwide during the last two decades. Indium tin oxide (ITO) is commonly used as a transparent conductive electrode in OPVs due to its large conductivity and good transmittance but it is fragile, rigid, and quite expensive. In this paper, flexible solar cells, with Poly (3, 4-ethylenedioxythiophene): poly(styrene-sulfonic acid) (PEDOT: PSS) transparent conductive electrodes are successfully demonstrated on a Polyethylene Naphthalate (PEN) substrate. Prior to PEDOT: PSS electrode, a buffer layer of polyvinyl alcohol (PVA) is added to PEN substrate. The OPV with PEDOT:PSS anode produced power conversion efficiency (PCE) average values of (12.0 % ± 0.1%) while the reference device with ITO exhibited PCE values of (8.0 % ± 0.0%) under a 500-lux-light emitting diode (LED) lamp. Besides PCE improvement, a flexible OPV device also exhibits superior flexibility over ITO as it can retain its PCE up to 85% even after 500 bending cycles in air while the PCE of ITO-based device declined to 15 % of its original value during a similar bending condition. To our knowledge, this excellent bending flexibility and PCE value are the highest recorded, under a 500-lux LED lamp on a PEN substrate.
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- 2023-02-27 (2)
- 2022-09-26 (1)
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Copyright (c) 2022 Ali Raza, Jeong hoon, Sung ho, Abdul-aziz Alsalman, Hee-Jin Jinho, Salman Akram
This work is licensed under a Creative Commons Attribution 4.0 International License.