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基于有机太阳能电池的多层电子传输层及其优异性能。

Multiple electron transporting layers and their excellent properties based on organic solar cell.

机构信息

School of Optoelectronics, Beijing Institute of Technology, Beijing, 100081, China.

Key Laboratory for Special Functional Materials of Ministry of Education, Henan University, Kaifeng, 475004, Henan, China.

出版信息

Sci Rep. 2017 Aug 29;7(1):9571. doi: 10.1038/s41598-017-08613-7.

DOI:10.1038/s41598-017-08613-7
PMID:28851887
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5575332/
Abstract

To improve the performance of inverted polymer solar cells based on a ternary blend of polymerthieno [3,4-b] thiophene/benzodithiophene (PTB7), [6,6]-phenyl C-butyric acid methyl ester (PCBM) and indene-C60-bisadduct (ICBA), a two-layer structure of zinc oxide (ZnO) and Al-doped zinc oxide (AZO) nanoperticles is used to improve electron extraction. Comparing to ZnO, AZO has lower work function and thus provides larger built-in potential across the organic heterojunction, resulting in more efficient photo-current extraction and larger open circuit voltages. Optimum devices with ZnO/AZO nanoparticles show enhancement of both short circuit current and open circuit voltage, leading to a power conversion efficiency (PCE) of 8.85%. The argument of energy level buffering and surface morphology is discussed in the paper. Finally, using a trilayer electron transporting unit of ZnO/AZO/PFN, the interface dipole between the organic active layer and AZO is introduced. The PCE is further enhanced to 9.17%.

摘要

为了提高基于聚合物噻吩[3,4-b]噻吩/苯并二噻吩（PTB7）、[6,6]-苯基 C-丁酸甲酯（PCBM）和茚并-C60-双加成物（ICBA）三元共混物的倒置聚合物太阳能电池的性能，使用氧化锌（ZnO）和掺铝氧化锌（AZO）纳米颗粒的双层结构来改善电子提取。与 ZnO 相比，AZO 的功函数更低，因此在有机异质结中提供更大的内置电势，从而实现更有效的光电流提取和更大的开路电压。具有 ZnO/AZO 纳米颗粒的最佳器件提高了短路电流和开路电压，从而实现了 8.85%的功率转换效率（PCE）。本文讨论了能级缓冲和表面形态的论点。最后，使用 ZnO/AZO/PFN 的三层电子传输单元，在有机活性层和 AZO 之间引入了界面偶极子。PCE 进一步提高到 9.17%。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2438/5575332/384b6ca6e7b4/41598_2017_8613_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2438/5575332/98520c384105/41598_2017_8613_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2438/5575332/fe2eae857d37/41598_2017_8613_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2438/5575332/6d3669d9e1b6/41598_2017_8613_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2438/5575332/b309c4c4d92b/41598_2017_8613_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2438/5575332/361d06f4d047/41598_2017_8613_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2438/5575332/dc0e4895c257/41598_2017_8613_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2438/5575332/019ec941170a/41598_2017_8613_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2438/5575332/3718244c0983/41598_2017_8613_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2438/5575332/c44cf8daeec8/41598_2017_8613_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2438/5575332/384b6ca6e7b4/41598_2017_8613_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2438/5575332/98520c384105/41598_2017_8613_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2438/5575332/fe2eae857d37/41598_2017_8613_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2438/5575332/6d3669d9e1b6/41598_2017_8613_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2438/5575332/b309c4c4d92b/41598_2017_8613_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2438/5575332/361d06f4d047/41598_2017_8613_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2438/5575332/dc0e4895c257/41598_2017_8613_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2438/5575332/019ec941170a/41598_2017_8613_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2438/5575332/3718244c0983/41598_2017_8613_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2438/5575332/c44cf8daeec8/41598_2017_8613_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2438/5575332/384b6ca6e7b4/41598_2017_8613_Fig10_HTML.jpg

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