Characterization of Strain-induced Defects Density in Flexible Organic Photovoltaic Cells using Capacitance Spectroscopy

• Salari Majid

  Department of Electrical Engineering, Ferdowsi University of Mashhad

• Naseri Ali

  Department of ICT, Imam Hossein University of Tehran

• Manesh Reza Tabatabai

  Researcher of the Knowledge-Based Society

抄録

The defect states have a prominent role in electrical performance of organic materials including polymers. Stretching flexible organic solar cells introduces new defects that reduce their efficiency notably. We have studied the changes of density and distribution of these defects versus strain in a roll-to-roll printed organic solar cell with P3HT:PCBM active layer. The junction capacitance spectroscopy, including C(V) and C(f) measurements, was employed as a novel and convenient method in solar cells under strain to characterize the density of states distribution over the band gap. C(V) measurements yielded flat-band potential and the total shallow defects density and C(f) spectroscopy resulted in distribution profiles. In both measurements, the junction capacitance increased with strain due to additional states contribution. The results show spreading of the distribution profile over more energy levels and more than 30% increase in total traps density for 50 mε mechanical strain.

収録刊行物

• Journal of Photopolymer Science and Technology

  Journal of Photopolymer Science and Technology 33 (6), 631-636, 2020-12-15

  フォトポリマー学会

キーワード

• Organic solar cells
• Flexible OPV
• Capacitance spectroscopy
• Mechanical strain
• Defect density of states

詳細情報

• CRID: 1390849931327871872
• NII論文ID: 130007966674
• NII書誌ID: AA11576862
• DOI: 10.2494/photopolymer.33.631
• ISSN: 13496336
• ISSN: 09149244
• NDL書誌ID: 031199009
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I031199009
• Web Site: https://www.jstage.jst.go.jp/article/photopolymer/33/6/33_631/_pdf
• 本文言語コード: en
• データソース種別:
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