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用于有机太阳能电池的新型2,3,4,5-四噻吩基噻吩-共-聚（3-己基噻吩-2,5-二亚基）给体聚合物的合成与光伏性能

Synthesis and Photovoltaics of Novel 2,3,4,5-Tetrathienylthiophene-co-poly(3-hexylthiophene-2,5-diyl) Donor Polymer for Organic Solar Cell.

作者信息

Ramoroka Morongwa E, Mdluli Siyabonga B, John-Denk Vivian S, Modibane Kwena D, Arendse Christopher J, Iwuoha Emmanuel I

机构信息

SensorLab (University of the Western Cape Sensor Laboratories), Chemical Sciences Building, Robert Sobukwe Road, Bellville, Cape Town 7535, South Africa.

Department of Chemistry, School of Physical and Mineral Science, University of Limpopo, Sovenga, Polokwane 0727, South Africa.

出版信息

Polymers (Basel). 2020 Dec 22;13(1):2. doi: 10.3390/polym13010002.

DOI:10.3390/polym13010002
PMID:33374983
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7792595/
Abstract

This report focuses on the synthesis of novel 2,3,4,5-tetrathienylthiophene-co-poly(3-hexylthiophene-2,5-diyl) (TTT-co-P3HT) as a donor material for organic solar cells (OSCs). The properties of the synthesized TTT-co-P3HT were compared with those of poly(3-hexylthiophene-2,5-diyl (P3HT). The structure of TTT-co-P3HT was studied using nuclear magnetic resonance spectroscopy (NMR) and Fourier-transform infrared spectroscopy (FTIR). It was seen that TTT-co-P3HT possessed a broader electrochemical and optical band-gap as compared to P3HT. Cyclic voltammetry (CV) was used to determine lowest unoccupied molecular orbital (LUMO) and highest occupied molecular orbital (HOMO) energy gaps of TTT-co-P3HT and P3HT were found to be 2.19 and 1.97 eV, respectively. Photoluminescence revealed that TTT-co-P3HT:PCBM have insufficient electron/hole separation and charge transfer when compared to P3HT:PCBM. All devices were fabricated outside a glovebox. Power conversion efficiency (PCE) of 1.15% was obtained for P3HT:PCBM device and 0.14% was obtained for TTT-co-P3HT:PCBM device. Further studies were done on fabricated OSCs during this work using electrochemical methods. The studies revealed that the presence of poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) on the surface of indium tin oxide (ITO) causes a reduction in cyclic voltammogram oxidation/reduction peak current and increases the charge transfer resistance in comparison with a bare ITO. We also examined the ITO/PEDOT:PSS electrode coated with TTT-co-P3HT:PCBM, TTT-co-P3HT:PCBM/ZnO, P3HT:PCBM and P3HT:PCBM/ZnO. The study revealed that PEDOT:PSS does not completely block electrons from active layer to reach the ITO electrode.

摘要

本报告重点关注新型2,3,4,5-四噻吩基噻吩-共-聚（3-己基噻吩-2,5-二亚基）（TTT-共-P3HT）作为有机太阳能电池（OSC）供体材料的合成。将合成的TTT-共-P3HT的性能与聚（3-己基噻吩-2,5-二亚基）（P3HT）的性能进行了比较。使用核磁共振光谱（NMR）和傅里叶变换红外光谱（FTIR）研究了TTT-共-P3HT的结构。可以看出，与P3HT相比，TTT-共-P3HT具有更宽的电化学和光学带隙。使用循环伏安法（CV）测定了TTT-共-P3HT的最低未占据分子轨道（LUMO）和最高占据分子轨道（HOMO）能隙，发现P3HT的能隙分别为2.19 eV和1.97 eV。光致发光表明，与P3HT:PCBM相比，TTT-共-P3HT:PCBM的电子/空穴分离和电荷转移不足。所有器件均在手套箱外制备。P3HT:PCBM器件的功率转换效率（PCE）为1.15%，TTT-共-P3HT:PCBM器件的功率转换效率为0.14%。在这项工作中，使用电化学方法对制备的有机太阳能电池进行了进一步研究。研究表明，与裸铟锡氧化物（ITO）相比，ITO表面存在聚（3,4-乙撑二氧噻吩）聚苯乙烯磺酸盐（PEDOT:PSS）会导致循环伏安图氧化/还原峰值电流降低，并增加电荷转移电阻。我们还检查了涂覆有TTT-共-P3HT:PCBM、TTT-共-P3HT:PCBM/ZnO、P3HT:PCBM和P3HT:PCBM/ZnO的ITO/PEDOT:PSS电极。研究表明，PEDOT:PSS不能完全阻止电子从活性层到达ITO电极。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/405f/7792595/d3c30f86315b/polymers-13-00002-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/405f/7792595/252f335d23d9/polymers-13-00002-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/405f/7792595/7d43fefd9c5d/polymers-13-00002-sch002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/405f/7792595/aae5a344bf36/polymers-13-00002-g001a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/405f/7792595/bec983577892/polymers-13-00002-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/405f/7792595/6104c7656460/polymers-13-00002-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/405f/7792595/5c6647607ecb/polymers-13-00002-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/405f/7792595/81402b95f441/polymers-13-00002-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/405f/7792595/ebec4b1c705e/polymers-13-00002-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/405f/7792595/d3c30f86315b/polymers-13-00002-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/405f/7792595/252f335d23d9/polymers-13-00002-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/405f/7792595/7d43fefd9c5d/polymers-13-00002-sch002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/405f/7792595/aae5a344bf36/polymers-13-00002-g001a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/405f/7792595/bec983577892/polymers-13-00002-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/405f/7792595/6104c7656460/polymers-13-00002-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/405f/7792595/5c6647607ecb/polymers-13-00002-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/405f/7792595/81402b95f441/polymers-13-00002-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/405f/7792595/ebec4b1c705e/polymers-13-00002-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/405f/7792595/d3c30f86315b/polymers-13-00002-g007.jpg

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