Thiophene and naphtho[1,2-c:5,6-c]bis[1,2,5]thiadiazole based alternating copolymers for polymer solar cells

Yuxiang Li, Tack Ho Lee, Jihyeon Kim, Song Yi Park, Seyeong Song, Sungu Hwang, Jin Young Kim, Han Young Woo

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Two planar type photovoltaic polymers based on naphthobisthiadiazole, poly(2,5-bis(2-hexyldecyloxy)phenylene-alt-(5,10-dithiophen-2-yl)naphtho[1,2-c:5,6-c]bis[1,2,5]thiadiazole) (h-PPDTNTz) and poly(2,5-bis(2-decyltetradecyloxy)phenylene-alt-(5,10-dithiophen-2-yl)naphtho[1,2-c:5,6-c]bis[1,2,5]thiadiazole) (d-PPDTNTz) were synthesized by incorporating intrachain noncovalent Coulombic interactions in the molecular design. To achieve a delicate balance of molecular weight, solubility as well as bulk film morphology, hexyldecyloxy (h-) and decyltetradecyloxy (d-) side-chains were substituted, which played a decisive role in modulating morphology, film packing structure and macroscopic device properties. Both polymers showed a broad light absorption up to ~800 nm and d-PPDTNTz exhibited a deeper HOMO and preferentially face-on orientation in pristine and blended films with PC71BM. The detailed optical, electrochemical, thermal, morphological and the resulting photovoltaic characteristics were studied. The best power conversion efficiency of ~6.7% was measured for d-PPDTNTz:PC71BM, suggesting that the careful choice of side-chains is necessary for fully optimize the photovoltaic materials and devices.

Original languageEnglish
Pages (from-to)553-559
Number of pages7
JournalJournal of Photopolymer Science and Technology
Volume29
Issue number4
DOIs
Publication statusPublished - 2016 Jan 1

Fingerprint

Thiadiazoles
Thiophenes
Thiophene
Copolymers
Polymers
Light absorption
Conversion efficiency
Solubility
Molecular weight
Polymer solar cells

Keywords

  • Naphtho[1,2-c:5,6-c]bis[1,2,5]thiadiazole (NTz)
  • Noncovalent coulombic interactions
  • Photovoltaic
  • Planarity
  • Polymer solar cells (PSCs)
  • Semi-crystalline

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

Cite this

Thiophene and naphtho[1,2-c:5,6-c]bis[1,2,5]thiadiazole based alternating copolymers for polymer solar cells. / Li, Yuxiang; Lee, Tack Ho; Kim, Jihyeon; Park, Song Yi; Song, Seyeong; Hwang, Sungu; Kim, Jin Young; Woo, Han Young.

In: Journal of Photopolymer Science and Technology, Vol. 29, No. 4, 01.01.2016, p. 553-559.

Research output: Contribution to journalArticle

Li, Yuxiang ; Lee, Tack Ho ; Kim, Jihyeon ; Park, Song Yi ; Song, Seyeong ; Hwang, Sungu ; Kim, Jin Young ; Woo, Han Young. / Thiophene and naphtho[1,2-c:5,6-c]bis[1,2,5]thiadiazole based alternating copolymers for polymer solar cells. In: Journal of Photopolymer Science and Technology. 2016 ; Vol. 29, No. 4. pp. 553-559.
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abstract = "Two planar type photovoltaic polymers based on naphthobisthiadiazole, poly(2,5-bis(2-hexyldecyloxy)phenylene-alt-(5,10-dithiophen-2-yl)naphtho[1,2-c:5,6-c]bis[1,2,5]thiadiazole) (h-PPDTNTz) and poly(2,5-bis(2-decyltetradecyloxy)phenylene-alt-(5,10-dithiophen-2-yl)naphtho[1,2-c:5,6-c]bis[1,2,5]thiadiazole) (d-PPDTNTz) were synthesized by incorporating intrachain noncovalent Coulombic interactions in the molecular design. To achieve a delicate balance of molecular weight, solubility as well as bulk film morphology, hexyldecyloxy (h-) and decyltetradecyloxy (d-) side-chains were substituted, which played a decisive role in modulating morphology, film packing structure and macroscopic device properties. Both polymers showed a broad light absorption up to ~800 nm and d-PPDTNTz exhibited a deeper HOMO and preferentially face-on orientation in pristine and blended films with PC71BM. The detailed optical, electrochemical, thermal, morphological and the resulting photovoltaic characteristics were studied. The best power conversion efficiency of ~6.7{\%} was measured for d-PPDTNTz:PC71BM, suggesting that the careful choice of side-chains is necessary for fully optimize the photovoltaic materials and devices.",
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AU - Li, Yuxiang

AU - Lee, Tack Ho

AU - Kim, Jihyeon

AU - Park, Song Yi

AU - Song, Seyeong

AU - Hwang, Sungu

AU - Kim, Jin Young

AU - Woo, Han Young

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AB - Two planar type photovoltaic polymers based on naphthobisthiadiazole, poly(2,5-bis(2-hexyldecyloxy)phenylene-alt-(5,10-dithiophen-2-yl)naphtho[1,2-c:5,6-c]bis[1,2,5]thiadiazole) (h-PPDTNTz) and poly(2,5-bis(2-decyltetradecyloxy)phenylene-alt-(5,10-dithiophen-2-yl)naphtho[1,2-c:5,6-c]bis[1,2,5]thiadiazole) (d-PPDTNTz) were synthesized by incorporating intrachain noncovalent Coulombic interactions in the molecular design. To achieve a delicate balance of molecular weight, solubility as well as bulk film morphology, hexyldecyloxy (h-) and decyltetradecyloxy (d-) side-chains were substituted, which played a decisive role in modulating morphology, film packing structure and macroscopic device properties. Both polymers showed a broad light absorption up to ~800 nm and d-PPDTNTz exhibited a deeper HOMO and preferentially face-on orientation in pristine and blended films with PC71BM. The detailed optical, electrochemical, thermal, morphological and the resulting photovoltaic characteristics were studied. The best power conversion efficiency of ~6.7% was measured for d-PPDTNTz:PC71BM, suggesting that the careful choice of side-chains is necessary for fully optimize the photovoltaic materials and devices.

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KW - Planarity

KW - Polymer solar cells (PSCs)

KW - Semi-crystalline

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