An Alkylated Indacenodithieno[3,2-b]thiophene-Based Nonfullerene Acceptor with High Crystallinity Exhibiting Single Junction Solar Cell Efficiencies Greater than 13% with Low Voltage Losses

Zhuping Fei, Flurin D. Eisner, Xuechen Jiao, Mohammed Azzouzi, Jason A. Röhr, Yang Han, Munazza Shahid, Anthony S.R. Chesman, Christopher D. Easton, Christopher R. McNeill, Thomas D. Anthopoulos, Jenny Nelson, Martin Heeney

Research output: Contribution to journalArticle

Abstract

A new synthetic route, to prepare an alkylated indacenodithieno[3,2-b]thiophene-based nonfullerene acceptor (C8-ITIC), is reported. Compared to the reported ITIC with phenylalkyl side chains, the new acceptor C8-ITIC exhibits a reduction in the optical band gap, higher absorptivity, and an increased propensity to crystallize. Accordingly, blends with the donor polymer PBDB-T exhibit a power conversion efficiency (PCE) up to 12.4%. Further improvements in efficiency are found upon backbone fluorination of the donor polymer to afford the novel material PFBDB-T. The resulting blend with C8-ITIC shows an impressive PCE up to 13.2% as a result of the higher open-circuit voltage. Electroluminescence studies demonstrate that backbone fluorination reduces the energy loss of the blends, with PFBDB-T/C8-ITIC-based cells exhibiting a small energy loss of 0.6 eV combined with a high JSC of 19.6 mA cm−2.

LanguageEnglish
Article number1705209
JournalAdvanced Materials
Volume30
Issue number8
DOIs
StatePublished - 22 Feb 2018
Externally publishedYes

Keywords

  • conjugated polymers
  • crystal engineering
  • nonfullerene acceptors
  • organic solar cells

Cite this

Fei, Zhuping ; Eisner, Flurin D. ; Jiao, Xuechen ; Azzouzi, Mohammed ; Röhr, Jason A. ; Han, Yang ; Shahid, Munazza ; Chesman, Anthony S.R. ; Easton, Christopher D. ; McNeill, Christopher R. ; Anthopoulos, Thomas D. ; Nelson, Jenny ; Heeney, Martin. / An Alkylated Indacenodithieno[3,2-b]thiophene-Based Nonfullerene Acceptor with High Crystallinity Exhibiting Single Junction Solar Cell Efficiencies Greater than 13% with Low Voltage Losses. In: Advanced Materials. 2018 ; Vol. 30, No. 8.
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title = "An Alkylated Indacenodithieno[3,2-b]thiophene-Based Nonfullerene Acceptor with High Crystallinity Exhibiting Single Junction Solar Cell Efficiencies Greater than 13{\%} with Low Voltage Losses",
abstract = "A new synthetic route, to prepare an alkylated indacenodithieno[3,2-b]thiophene-based nonfullerene acceptor (C8-ITIC), is reported. Compared to the reported ITIC with phenylalkyl side chains, the new acceptor C8-ITIC exhibits a reduction in the optical band gap, higher absorptivity, and an increased propensity to crystallize. Accordingly, blends with the donor polymer PBDB-T exhibit a power conversion efficiency (PCE) up to 12.4{\%}. Further improvements in efficiency are found upon backbone fluorination of the donor polymer to afford the novel material PFBDB-T. The resulting blend with C8-ITIC shows an impressive PCE up to 13.2{\%} as a result of the higher open-circuit voltage. Electroluminescence studies demonstrate that backbone fluorination reduces the energy loss of the blends, with PFBDB-T/C8-ITIC-based cells exhibiting a small energy loss of 0.6 eV combined with a high JSC of 19.6 mA cm−2.",
keywords = "conjugated polymers, crystal engineering, nonfullerene acceptors, organic solar cells",
author = "Zhuping Fei and Eisner, {Flurin D.} and Xuechen Jiao and Mohammed Azzouzi and R{\"o}hr, {Jason A.} and Yang Han and Munazza Shahid and Chesman, {Anthony S.R.} and Easton, {Christopher D.} and McNeill, {Christopher R.} and Anthopoulos, {Thomas D.} and Jenny Nelson and Martin Heeney",
year = "2018",
month = "2",
day = "22",
doi = "10.1002/adma.201705209",
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Fei, Z, Eisner, FD, Jiao, X, Azzouzi, M, Röhr, JA, Han, Y, Shahid, M, Chesman, ASR, Easton, CD, McNeill, CR, Anthopoulos, TD, Nelson, J & Heeney, M 2018, 'An Alkylated Indacenodithieno[3,2-b]thiophene-Based Nonfullerene Acceptor with High Crystallinity Exhibiting Single Junction Solar Cell Efficiencies Greater than 13% with Low Voltage Losses' Advanced Materials, vol 30, no. 8, 1705209. DOI: 10.1002/adma.201705209

An Alkylated Indacenodithieno[3,2-b]thiophene-Based Nonfullerene Acceptor with High Crystallinity Exhibiting Single Junction Solar Cell Efficiencies Greater than 13% with Low Voltage Losses. / Fei, Zhuping; Eisner, Flurin D.; Jiao, Xuechen; Azzouzi, Mohammed; Röhr, Jason A.; Han, Yang; Shahid, Munazza; Chesman, Anthony S.R.; Easton, Christopher D.; McNeill, Christopher R.; Anthopoulos, Thomas D.; Nelson, Jenny; Heeney, Martin.

In: Advanced Materials, Vol. 30, No. 8, 1705209, 22.02.2018.

Research output: Contribution to journalArticle

TY - JOUR

T1 - An Alkylated Indacenodithieno[3,2-b]thiophene-Based Nonfullerene Acceptor with High Crystallinity Exhibiting Single Junction Solar Cell Efficiencies Greater than 13% with Low Voltage Losses

AU - Fei,Zhuping

AU - Eisner,Flurin D.

AU - Jiao,Xuechen

AU - Azzouzi,Mohammed

AU - Röhr,Jason A.

AU - Han,Yang

AU - Shahid,Munazza

AU - Chesman,Anthony S.R.

AU - Easton,Christopher D.

AU - McNeill,Christopher R.

AU - Anthopoulos,Thomas D.

AU - Nelson,Jenny

AU - Heeney,Martin

PY - 2018/2/22

Y1 - 2018/2/22

N2 - A new synthetic route, to prepare an alkylated indacenodithieno[3,2-b]thiophene-based nonfullerene acceptor (C8-ITIC), is reported. Compared to the reported ITIC with phenylalkyl side chains, the new acceptor C8-ITIC exhibits a reduction in the optical band gap, higher absorptivity, and an increased propensity to crystallize. Accordingly, blends with the donor polymer PBDB-T exhibit a power conversion efficiency (PCE) up to 12.4%. Further improvements in efficiency are found upon backbone fluorination of the donor polymer to afford the novel material PFBDB-T. The resulting blend with C8-ITIC shows an impressive PCE up to 13.2% as a result of the higher open-circuit voltage. Electroluminescence studies demonstrate that backbone fluorination reduces the energy loss of the blends, with PFBDB-T/C8-ITIC-based cells exhibiting a small energy loss of 0.6 eV combined with a high JSC of 19.6 mA cm−2.

AB - A new synthetic route, to prepare an alkylated indacenodithieno[3,2-b]thiophene-based nonfullerene acceptor (C8-ITIC), is reported. Compared to the reported ITIC with phenylalkyl side chains, the new acceptor C8-ITIC exhibits a reduction in the optical band gap, higher absorptivity, and an increased propensity to crystallize. Accordingly, blends with the donor polymer PBDB-T exhibit a power conversion efficiency (PCE) up to 12.4%. Further improvements in efficiency are found upon backbone fluorination of the donor polymer to afford the novel material PFBDB-T. The resulting blend with C8-ITIC shows an impressive PCE up to 13.2% as a result of the higher open-circuit voltage. Electroluminescence studies demonstrate that backbone fluorination reduces the energy loss of the blends, with PFBDB-T/C8-ITIC-based cells exhibiting a small energy loss of 0.6 eV combined with a high JSC of 19.6 mA cm−2.

KW - conjugated polymers

KW - crystal engineering

KW - nonfullerene acceptors

KW - organic solar cells

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U2 - 10.1002/adma.201705209

DO - 10.1002/adma.201705209

M3 - Article

VL - 30

JO - Advanced Materials

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