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Contact-printed ultrathin siloxane passivation layer for high-performance Si-PEDOTPSS hybrid solar cells.pdf
Microelectronic Engineering 170 (2017) 1–7
Contents lists available at ScienceDirect
Microelectronic Engineering
journal homepage: /locate/mee
Research paper
Contact-printed ultrathin siloxane passivation layer for high-performance Si-PEDOT:PSS hybrid solar cells
Sung-Soo Yoon, Gyeong-Ryul Lee, Dahl-Young Khang ?
Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Republic of Korea
article info
Article history: Received 7 October 2016 Received in revised form 24 November 2016 Accepted 9 December 2016 Available online 19 December 2016
Keywords: Si-PEDOT:PSS hybrid solar cell Passivation layer Hydrophobic recovery Siloxane Contact-printing
abstract
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 b0.5 nm thin siloxane layer at interfaces. The printed ultrathin siloxane plays the role of passivation layer and signi?cantly increases the photocurrent by suppressing charge carrier recombination at interfaces, leading to N 13% cell ef?ciency 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 hybr
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