11%-Efficiency hybrid organic/silicon-nanowire heterojunction solar cell with an intermediate 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane layer

Chia Ying Tsai, Po Han Chen, Yang Yue Huang, Huai Te Pen, Peichen Yu, Hsin-Fei Meng

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

2 Scopus citations

Abstract

Hybrid organic-inorganic heterojunction solar cells based on silicon nanowires (SiNWs) are promising candidates for next-generation photovoltaics owing to potentials for low fabrication cost and high efficiency. The SiNW array, fabricated by a simple metal-assisted wet chemical etching method, produces a large surface-area-to-volume ratio, hence allowing efficient light harvesting and charge collection via the formation of a core-sheath p-n junction. However, previously reported power conversion efficiencies (PCEs) are approximately capped at 10%, which is largely depicted by the interface defect densities that limit the open-circuit voltage (Voc) and fill factor (FF). In this work, we introduce a solution-processed, intermediate 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane (TAPC) layer to mitigate the interface recombination loss for hybrid heterojunction solar cells consisted of SiNWs and conjugate polymer poly(3,4-ethylenedioxy-thiophene): poly(styrenesulfonate) (PEDOT:PSS). A record PCE of 11.0% is achieved in contrast to 9.6% from a reference counterpart without TAPC, which represents an enhancement factor of 14.2% ascribed to noticeable improvement in the Voc and FF. The result is further supported by examining indicators for the interface quality via a suppressed dark saturation current and an enhanced minority carrier lifetime which exhibits an increase from 84 μsec without TAPC to 87 μsec with TAPC.

Original languageEnglish
Title of host publication39th IEEE Photovoltaic Specialists Conference, PVSC 2013
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages3297-3299
Number of pages3
ISBN (Print)9781479932993
DOIs
StatePublished - 1 Jan 2013
Event39th IEEE Photovoltaic Specialists Conference, PVSC 2013 - Tampa, FL, United States
Duration: 16 Jun 201321 Jun 2013

Publication series

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

Conference

Conference39th IEEE Photovoltaic Specialists Conference, PVSC 2013
CountryUnited States
CityTampa, FL
Period16/06/1321/06/13

Keywords

  • Heterojunction
  • Hybrid solar cells
  • Nanostructure
  • Silicon nanowires (SiNWs)

Fingerprint Dive into the research topics of '11%-Efficiency hybrid organic/silicon-nanowire heterojunction solar cell with an intermediate 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane layer'. Together they form a unique fingerprint.

Cite this