15.51 % efficiency all-small-molecule organic solar cells achieved by symmetric thiazolyl substitution

Simin Wu; Wanying Feng; Lingxian Meng; Zhe Zhang; Xiaodong Si; Yu Chen; Xiangjian Wan; Chenxi Li; Zhaoyang Yao; Yongsheng Chen

doi:10.1016/j.nanoen.2022.107801

15.51 % efficiency all-small-molecule organic solar cells achieved by symmetric thiazolyl substitution

Simin Wu, Wanying Feng, Lingxian Meng, Zhe Zhang, Xiaodong Si, Yu Chen, Xiangjian Wan, Chenxi Li, Zhaoyang Yao, Yongsheng Chen^*

^*Corresponding author for this work

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

28 Citations (Scopus)

Abstract

Two new small molecule donors of SW1 and SW2 are designed and synthesized by employing thiophene and thiazole substituents as the side groups of benzo[1,2-b:4,5-b′]dithiophene central unit, respectively. Due to the more electron-withdrawing feature and enhanced intermolecular stacking of SW2 with respect to that of SW1, the all-small-molecule (ASM) organic solar cells (OSCs) based on SW2 afford a much better power conversion efficiency up to 15.51 %, along with both enlarged open-circuit voltage and fill factor. Further systematic investigation demonstrates that thiazole could act as an excellent building block to optimize the energy levels, molecular stacking as well as microscopic morphologies in ASM systems, leading to the highly efficient ASM-OSCs.

Original language	English
Article number	107801
Journal	Nano Energy
Volume	103
DOIs	https://doi.org/10.1016/j.nanoen.2022.107801
Publication status	Published - 1 Dec 2022
Externally published	Yes

Keywords

All-small-molecule
Energy levels tuning
Molecular stacking optimization
Organic solar cells
Thiazole substituent

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.nanoen.2022.107801

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title = "15.51 % efficiency all-small-molecule organic solar cells achieved by symmetric thiazolyl substitution",

abstract = "Two new small molecule donors of SW1 and SW2 are designed and synthesized by employing thiophene and thiazole substituents as the side groups of benzo[1,2-b:4,5-b′]dithiophene central unit, respectively. Due to the more electron-withdrawing feature and enhanced intermolecular stacking of SW2 with respect to that of SW1, the all-small-molecule (ASM) organic solar cells (OSCs) based on SW2 afford a much better power conversion efficiency up to 15.51 %, along with both enlarged open-circuit voltage and fill factor. Further systematic investigation demonstrates that thiazole could act as an excellent building block to optimize the energy levels, molecular stacking as well as microscopic morphologies in ASM systems, leading to the highly efficient ASM-OSCs.",

keywords = "All-small-molecule, Energy levels tuning, Molecular stacking optimization, Organic solar cells, Thiazole substituent",

author = "Simin Wu and Wanying Feng and Lingxian Meng and Zhe Zhang and Xiaodong Si and Yu Chen and Xiangjian Wan and Chenxi Li and Zhaoyang Yao and Yongsheng Chen",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier Ltd",

year = "2022",

month = dec,

day = "1",

doi = "10.1016/j.nanoen.2022.107801",

language = "English",

volume = "103",

journal = "Nano Energy",

issn = "2211-2855",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - 15.51 % efficiency all-small-molecule organic solar cells achieved by symmetric thiazolyl substitution

AU - Wu, Simin

AU - Feng, Wanying

AU - Meng, Lingxian

AU - Zhang, Zhe

AU - Si, Xiaodong

AU - Chen, Yu

AU - Wan, Xiangjian

AU - Li, Chenxi

AU - Yao, Zhaoyang

AU - Chen, Yongsheng

PY - 2022/12/1

Y1 - 2022/12/1

N2 - Two new small molecule donors of SW1 and SW2 are designed and synthesized by employing thiophene and thiazole substituents as the side groups of benzo[1,2-b:4,5-b′]dithiophene central unit, respectively. Due to the more electron-withdrawing feature and enhanced intermolecular stacking of SW2 with respect to that of SW1, the all-small-molecule (ASM) organic solar cells (OSCs) based on SW2 afford a much better power conversion efficiency up to 15.51 %, along with both enlarged open-circuit voltage and fill factor. Further systematic investigation demonstrates that thiazole could act as an excellent building block to optimize the energy levels, molecular stacking as well as microscopic morphologies in ASM systems, leading to the highly efficient ASM-OSCs.

AB - Two new small molecule donors of SW1 and SW2 are designed and synthesized by employing thiophene and thiazole substituents as the side groups of benzo[1,2-b:4,5-b′]dithiophene central unit, respectively. Due to the more electron-withdrawing feature and enhanced intermolecular stacking of SW2 with respect to that of SW1, the all-small-molecule (ASM) organic solar cells (OSCs) based on SW2 afford a much better power conversion efficiency up to 15.51 %, along with both enlarged open-circuit voltage and fill factor. Further systematic investigation demonstrates that thiazole could act as an excellent building block to optimize the energy levels, molecular stacking as well as microscopic morphologies in ASM systems, leading to the highly efficient ASM-OSCs.

KW - All-small-molecule

KW - Energy levels tuning

KW - Molecular stacking optimization

KW - Organic solar cells

KW - Thiazole substituent

UR - http://www.scopus.com/inward/record.url?scp=85138050278&partnerID=8YFLogxK

U2 - 10.1016/j.nanoen.2022.107801

DO - 10.1016/j.nanoen.2022.107801

M3 - Article

AN - SCOPUS:85138050278

SN - 2211-2855

VL - 103

JO - Nano Energy

JF - Nano Energy

M1 - 107801

ER -

15.51 % efficiency all-small-molecule organic solar cells achieved by symmetric thiazolyl substitution

Abstract

Keywords

UN SDGs

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