Solution-processable crystalline platinum-acetylide oligomers with broadband absorption for photovoltaic cells

Xiaoyong Zhao; Claudia Piliego; Bongsoo Kim; Daniel A. Poulsen; Biwu Ma; David A. Unruh; Jean M.J. Fréchet

doi:10.1021/cm903329a

Solution-processable crystalline platinum-acetylide oligomers with broadband absorption for photovoltaic cells

Xiaoyong Zhao, Claudia Piliego, Bongsoo Kim, Daniel A. Poulsen, Biwu Ma, David A. Unruh, Jean M.J. Fréchet

Research output: Contribution to journal › Article › peer-review

97 Scopus citations

Abstract

A series of solution-processable and crystalline platinum-acetylide oligomers containing a thienyl-benzothiadiazole-thienyl core and oligothiophene alkynyl ligands are synthesized and characterized. X-ray crystallography analysis indicates a two-dimensional arrangement of oligomers through CH- interactions in single crystals. These oligomers show two intense and broad absorption bands in the visible spectral region, with the short-wavelength absorption band being strongly dependent on the oligothiophene length. In neat films, all the oligomers form large crystalline domains of several hundred nanometers in size upon thermal treatment and exhibit space-charge limited current (SCLC) mobilities on the order of 10^-5-10^-4 cm²-V^-1-s^-1. The photovoltaic properties of these oligomers were evaluated by fabricating bulk heterojunction devices with fullerene derivatives (PC₆₁BM and PC₇₁BM) and some of these devices showed high-power conversion efficiencies (PCEs) of up to 3% and a peak external quantum efficiency (EQE) to 50% under AM 1.5 simulated solar illumination. The present work suggests that well-defined platinum oligomers with desirable light-absorbing and self-assembly properties have potential for solution-processed organic photovoltaics.

Original language	English (US)
Pages (from-to)	2325-2332
Number of pages	8
Journal	Chemistry of Materials
Volume	22
Issue number	7
DOIs	https://doi.org/10.1021/cm903329a
State	Published - Apr 13 2010
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Materials Chemistry

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10.1021/cm903329a

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title = "Solution-processable crystalline platinum-acetylide oligomers with broadband absorption for photovoltaic cells",

abstract = "A series of solution-processable and crystalline platinum-acetylide oligomers containing a thienyl-benzothiadiazole-thienyl core and oligothiophene alkynyl ligands are synthesized and characterized. X-ray crystallography analysis indicates a two-dimensional arrangement of oligomers through CH- interactions in single crystals. These oligomers show two intense and broad absorption bands in the visible spectral region, with the short-wavelength absorption band being strongly dependent on the oligothiophene length. In neat films, all the oligomers form large crystalline domains of several hundred nanometers in size upon thermal treatment and exhibit space-charge limited current (SCLC) mobilities on the order of 10-5-10-4 cm2-V-1-s-1. The photovoltaic properties of these oligomers were evaluated by fabricating bulk heterojunction devices with fullerene derivatives (PC61BM and PC71BM) and some of these devices showed high-power conversion efficiencies (PCEs) of up to 3% and a peak external quantum efficiency (EQE) to 50% under AM 1.5 simulated solar illumination. The present work suggests that well-defined platinum oligomers with desirable light-absorbing and self-assembly properties have potential for solution-processed organic photovoltaics.",

author = "Xiaoyong Zhao and Claudia Piliego and Bongsoo Kim and Poulsen, {Daniel A.} and Biwu Ma and Unruh, {David A.} and Fr{\'e}chet, {Jean M.J.}",

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doi = "10.1021/cm903329a",

language = "English (US)",

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T1 - Solution-processable crystalline platinum-acetylide oligomers with broadband absorption for photovoltaic cells

AU - Zhao, Xiaoyong

AU - Piliego, Claudia

AU - Kim, Bongsoo

AU - Poulsen, Daniel A.

AU - Ma, Biwu

AU - Unruh, David A.

AU - Fréchet, Jean M.J.

PY - 2010/4/13

Y1 - 2010/4/13

N2 - A series of solution-processable and crystalline platinum-acetylide oligomers containing a thienyl-benzothiadiazole-thienyl core and oligothiophene alkynyl ligands are synthesized and characterized. X-ray crystallography analysis indicates a two-dimensional arrangement of oligomers through CH- interactions in single crystals. These oligomers show two intense and broad absorption bands in the visible spectral region, with the short-wavelength absorption band being strongly dependent on the oligothiophene length. In neat films, all the oligomers form large crystalline domains of several hundred nanometers in size upon thermal treatment and exhibit space-charge limited current (SCLC) mobilities on the order of 10-5-10-4 cm2-V-1-s-1. The photovoltaic properties of these oligomers were evaluated by fabricating bulk heterojunction devices with fullerene derivatives (PC61BM and PC71BM) and some of these devices showed high-power conversion efficiencies (PCEs) of up to 3% and a peak external quantum efficiency (EQE) to 50% under AM 1.5 simulated solar illumination. The present work suggests that well-defined platinum oligomers with desirable light-absorbing and self-assembly properties have potential for solution-processed organic photovoltaics.

AB - A series of solution-processable and crystalline platinum-acetylide oligomers containing a thienyl-benzothiadiazole-thienyl core and oligothiophene alkynyl ligands are synthesized and characterized. X-ray crystallography analysis indicates a two-dimensional arrangement of oligomers through CH- interactions in single crystals. These oligomers show two intense and broad absorption bands in the visible spectral region, with the short-wavelength absorption band being strongly dependent on the oligothiophene length. In neat films, all the oligomers form large crystalline domains of several hundred nanometers in size upon thermal treatment and exhibit space-charge limited current (SCLC) mobilities on the order of 10-5-10-4 cm2-V-1-s-1. The photovoltaic properties of these oligomers were evaluated by fabricating bulk heterojunction devices with fullerene derivatives (PC61BM and PC71BM) and some of these devices showed high-power conversion efficiencies (PCEs) of up to 3% and a peak external quantum efficiency (EQE) to 50% under AM 1.5 simulated solar illumination. The present work suggests that well-defined platinum oligomers with desirable light-absorbing and self-assembly properties have potential for solution-processed organic photovoltaics.

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JO - Chemistry of Materials

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Solution-processable crystalline platinum-acetylide oligomers with broadband absorption for photovoltaic cells

Abstract

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