Contact-printed ultrathin siloxane passivation layer for high-performance Si-PEDOT:PSS hybrid solar cells

Sung Soo Yoon, Gyeong Ryul Lee, Dahl Young Khang

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


A simple way for high-performance planar Si-PEDOT:PSS hybrid solar cells have been demonstrated in this work. Contact-printed, hydrophobically-recovered ultrathin siloxane layer has been employed as insertion layers at interfaces in Si-PEDOT:PSS hybrid solar cells. The printing has been done at room ambient in dry state for 5– 10 min, which has led to < 0.5 nm thin siloxane layer at interfaces. The printed ultrathin siloxane plays the role of passivation layer and significantly increases the photocurrent by suppressing charge carrier recombination at interfaces, leading to > 13% cell efficiency with non-textured planar Si substrate. Interestingly, the layer has been found to be equally effective at both interfaces (‘top’ interface between Si and PEDOT:PSS, and ‘bottom’ interface between Si and bottom electrode), while other insertion layers suggested in literature works at one interface only. Furthermore, the sheet resistance of PEDOT:PSS layer, rather than resistivity or conductivity, has been found to be the relevant characteristics in the hybrid solar cells, because the carrier conduction in 2-dimension is utmost importance in such devices. The suggested method can be a valuable help for low-cost, high-performance Si-PEDOT:PSS hybrid solar cells and can expedite the commercialization of the hybrid photovoltaics in near future.

Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalMicroelectronic Engineering
Publication statusPublished - 2017 Feb 25

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation Grant funded by the Korean Government (MEST) (NRF2010-C1AAA001-0029061).

Publisher Copyright:
© 2016 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering


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