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一种含[1,2,5]硒二唑并[3,4-c]吡啶单元的交替D1-A-D2-A共轭三元共聚物，其光电流响应高达1100纳米。

An Alternating D1-A-D2-A Conjugated Ternary Copolymer Containing [1,2,5]selenadiazolo[3,4-c]pyridine Unit With Photocurrent Response Up to 1,100 nm.

作者信息

Huang Xuelong, Lan Ning, Yan Yunnan, Hu Xin, Liu Shengjian

机构信息

Department of Pharmaceutical Engineering, College of Pharmacy, Gannan Medical University, Ganzhou, China.

Guangzhou Key Laboratory of Materials for Energy Conversion and Storage, Guangdong Provincial Engineering Technology Research Center for Materials for Energy Conversion and Storage, School of Chemistry, South China Normal University, Guangzhou, China.

出版信息

Front Chem. 2020 Apr 28;8:255. doi: 10.3389/fchem.2020.00255. eCollection 2020.

DOI:10.3389/fchem.2020.00255
PMID:32411657
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7198836/
Abstract

Two narrow band gap conjugated ternary copolymers comprising two electron-rich (donor, D) and one electron-deficient (acceptor, A) moieties regularly alternating along the polymer backbone were designed and synthesized. The polymers with the repeating unit in a D1-A-D2-A manner were constructed by copolymerizing a bisstannyled-D1 (D1 = n-alkyl-substituted cyclopentadithiophene) and a dibromo-monomer (Br-A-D2-A-Br, D2 = branched-alkyl-substituted cyclopentadithiophene, A =[1,2,5]selenadiazolo[3,4-c]pyridine or 5-fluorobenzo[c][1,2,5]selenadiazole) through a palladium-catalyzed Stille polymerization. This approach that enables variations in the donor fragment substituents can not only control the polymer regiochemistry but also the solubility. Two ternary copolymers exhibited absorbance up to near-infrared region along with relatively narrow band gap in the range of 1.02-1.26 eV. The polymeric photovoltaic cells based on CDTPSE/PCBM show the short circuit density of 1.45 mA cm, open current voltage of 0.53 V, and photocurrent spectra response from 300 to 1,150 nm under AM 1.5 simulator (100 mW cm). It is indicated that it can be potentially applied to near infrared photodetectors.

摘要

设计并合成了两种窄带隙共轭三元共聚物，它们由两个富电子（给体，D）和一个缺电子（受体，A）部分沿着聚合物主链规则交替组成。通过双锡烷基化的D1（D1 = n-烷基取代的环戊二噻吩）与二溴单体（Br-A-D2-A-Br，D2 = 支链烷基取代的环戊二噻吩，A = [1,2,5]硒二唑并[3,4-c]吡啶或5-氟苯并[c][1,2,5]硒二唑）经钯催化的Stille聚合反应，构建了具有D1-A-D2-A重复单元的聚合物。这种能够改变给体片段取代基的方法不仅可以控制聚合物的区域化学，还能控制其溶解性。两种三元共聚物在近红外区域表现出吸收，且带隙相对较窄，范围在1.02 - 1.26 eV。基于CDTPSE/PCBM的聚合物光伏电池在AM 1.5模拟器（100 mW cm）下显示出短路密度为1.45 mA cm、开路电压为0.53 V以及30到1150 nm的光电流光谱响应。这表明它有可能应用于近红外光电探测器。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6d1f/7198836/7e61652f616e/fchem-08-00255-g0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6d1f/7198836/6e241f5c83ad/fchem-08-00255-g0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6d1f/7198836/2cfcb188b497/fchem-08-00255-g0008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6d1f/7198836/12904b398149/fchem-08-00255-g0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6d1f/7198836/b3c1494600e4/fchem-08-00255-g0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6d1f/7198836/feb67c5efb1e/fchem-08-00255-g0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6d1f/7198836/93b51a24f2ba/fchem-08-00255-g0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6d1f/7198836/74cc54e42c84/fchem-08-00255-g0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6d1f/7198836/7e61652f616e/fchem-08-00255-g0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6d1f/7198836/6e241f5c83ad/fchem-08-00255-g0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6d1f/7198836/2cfcb188b497/fchem-08-00255-g0008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6d1f/7198836/12904b398149/fchem-08-00255-g0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6d1f/7198836/b3c1494600e4/fchem-08-00255-g0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6d1f/7198836/feb67c5efb1e/fchem-08-00255-g0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6d1f/7198836/93b51a24f2ba/fchem-08-00255-g0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6d1f/7198836/74cc54e42c84/fchem-08-00255-g0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6d1f/7198836/7e61652f616e/fchem-08-00255-g0006.jpg

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