Low temperature efficient interconnecting layer for tandem polymer solar cells

Abu Farzan Mitul, Lal Mohammad, Swaminathan Venkatesan, Nirmal Adhikari, Sudhan Sigdel, Qi Wang, Ashish Dubey, Devendra Khatiwada, Qiquan Qiao

Research output: Contribution to journalArticlepeer-review

37 Scopus citations


Tandem solar cells are found to be promising in organic photovoltaic research because they can double open-circuit voltage (Voc) and utilize photon energy efficiently, as compared to single junction solar cells. In a typical tandem polymer solar cell, two single subcells are staked and connected by an interconnecting layer, which is a prerequisite to achieving high photo-electron conversion efficiency. In this work, a low temperature solution processed and chemically stable PEDOT:PSS/AZO/PEIE interconnecting layer is reported. Tandem polymer solar cells based on this efficient layer can realize a high Voc, which can sum the Voc[U+05F3]s of subcells. Furthermore, the operation mechanism of the interconnecting layer is discussed to help better understand the electron recombination process in the interconnecting layer.

Original languageEnglish (US)
Pages (from-to)56-63
Number of pages8
JournalNano Energy
StatePublished - Jan 1 2015
Externally publishedYes


  • Interconnecting layer
  • PEIE
  • Polymer solar cells
  • Tandem structure

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • General Materials Science
  • Electrical and Electronic Engineering


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