Evaluation of Organic Electron Selective Contact for Hybrid PEDOT:PSS- Silicon Solar Cells

Bo Hua Lin, Yu Chun Chang, Chi Te Lin, Po Hsuan Chu, Hsin-Fei Meng, Peichen Yul

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Hybrid PEDOT:PSS- silicon heterojunction solar cells have garnered significant interest over the past few years due to their low-temperature processes that are benign to thin-silicon substrates, and a wide variety of organic and inorganic material selections that are capable of solution processes. In this work, we investigate and compare the properties of three materials: buckminsterfullerene (C60), a common fullerene derivative, [6,6]-Phenyl C71 butyric acid methyl ester (PCBM) and an organic small-molecule 1,3-bis(2-(4-tert-butylphenyl)-1,3,4-oxadiazol-5-yl) benzene (OXD-7) to serve as the electron selective layer for the hybrid solar cells. The materials are separately dissolved in chlorobenzene (CB) and then bladed-coated onto the rear side of the hybrid solar cell. We have found that all devices show notable enhancement in the power conversion efficiency compared to the reference device without a rear interlayer between n-si wafer and the aluminum electrode. However, the devices with PCBM and OXD-7 show slight enhancement on the open-circuit voltage (~10mV net increase) and fill factor (~1% net increase), suggesting electron transport is facilitated. On the other hand, the device with C60 shows a clear improvement on the open-circuit voltage by almost 40mV, indicating a field passivation effect, while the fill factor is degraded by 2-3%. Further work on the carrier selectivity is still in progress and will be presented.

Original languageEnglish
Title of host publication2020 47th IEEE Photovoltaic Specialists Conference, PVSC 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages5
ISBN (Electronic)9781728161150
StatePublished - 15 Jun 2020
Event47th IEEE Photovoltaic Specialists Conference, PVSC 2020 - Calgary, Canada
Duration: 15 Jun 202021 Aug 2020

Publication series

NameConference Record of the IEEE Photovoltaic Specialists Conference
ISSN (Print)0160-8371


Conference47th IEEE Photovoltaic Specialists Conference, PVSC 2020


  • Carrier Selective material
  • organic hybrid solar cell


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