Energy level engineering in ternary organic solar cells: Evaluating exciton dissociation at organic semiconductor interfaces

2017 ◽  
Vol 110 (13) ◽  
pp. 133301 ◽  
Author(s):  
Krishna Feron ◽  
Mahir N. Thameel ◽  
Mohammed F. Al-Mudhaffer ◽  
Xiaojing Zhou ◽  
Warwick J. Belcher ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Level ◽  
Organic Semiconductor ◽  
Organic Solar Cells ◽  
Exciton Dissociation ◽  
Semiconductor Interfaces

Side-Chain Effects on Energy-Level Modulation and Device Performance of Organic Semiconductor Acceptors in Organic Solar Cells

2017 ◽  
Vol 9 (39) ◽  
pp. 34146-34152 ◽  
Author(s):  
Zhenghui Luo ◽  
Yuan Zhao ◽  
Zhi-Guo Zhang ◽  
Guanghao Li ◽  
Kailong Wu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Level ◽  
Organic Semiconductor ◽  
Organic Solar Cells ◽  
Side Chain ◽  
Device Performance

Unraveling the Temperature Dependence of Exciton Dissociation and Free Charge Generation in Nonfullerene Organic Solar Cells

Solar RRL ◽  
2021 ◽  
Vol 5 (4) ◽  
pp. 2000789
Author(s):  
Chao Ma ◽  
Christopher C. S. Chan ◽  
Xinhui Zou ◽  
Han Yu ◽  
Jianquan Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Temperature Dependence ◽  
Organic Solar Cells ◽  
Free Charge ◽  
Exciton Dissociation ◽  
Charge Generation

scholarly journals The Effects of Molecular Packing Behavior of Small-Molecule Acceptors in Ternary Organic Solar Cells

2021 ◽  
Vol 11 (2) ◽  
pp. 755
Author(s):  
Eunhee Lim
Keyword(s):  
Solar Cells ◽  
Energy Level ◽  
Ternary System ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Orbital Energy ◽  
Working Mechanism ◽  
Energy Level Structure ◽  
The Third ◽  
Molecular Backbone

Herein, two diketopyrrolopyrrole (DPP)-based, small-molecule isomers, o- and p-DPP-PhCN, were introduced as acceptors in ternary organic solar cells (OSCs). The isomers have the same molecular backbone but differ in the positions of the cyanide (CN) substituents (ortho and para), which greatly affects their packing behavior. Ternary solar cells composed of poly(3-hexylthiophene) (P3HT):DPP-PhCN:phenyl-C61-butyric acid methyl ester (PCBM) were fabricated, and the effects of the different packing behaviors of the third component on the device performance and the working mechanism of the ternary cells were investigated. The addition of o-DPP-PhCN with a relatively high-lying lowest unoccupied molecular orbital energy level resulted in an increase in the open-circuit voltage (VOC) in the ternary devices, demonstrating the alloy-like structure of the two acceptors (o-DPP-PhCN and PCBM) in the ternary system. However, the p-DPP-PhCN-based ternary cells exhibited VOC values similar to that of a P3HT:PCBM binary cell, irrespective of the addition of p-DPP-PhCN, indicating a cascade energy-level structure in the ternary system and an effective charge transfer from the P3HT to the PCBM. Importantly, by increasing the addition of p-DPP-PhCN, the short-circuit current density increased substantially, resulting in pronounced shoulder peaks in the external quantum efficiency responses in the long-wavelength region, corresponding to the contribution of the photocurrent generated by the light absorption of p-DPP-PhCN. Despite sharing the same molecular backbone, the two DPP-PhCNs exhibited substantially different packing behaviors according to the position of their CN substituents, which also greatly affected the working mechanism of the ternary devices fabricated using the DPP-PhCNs as the third component.

Uphill and downhill charge generation from charge transfer to charge separated states in organic solar cells

2021 ◽  
Author(s):  
Shahidul Alam ◽  
Vojtech Nádaždy ◽  
Tomáš Váry ◽  
Christian Friebe ◽  
Rico Meitzner ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Solar Cells ◽  
Charge Transfer ◽  
Energy Level ◽  
Density Of States ◽  
Organic Solar Cells ◽  
Joint Density ◽  
Charge Generation ◽  
Donor Acceptor

Energy level alignments at the organic donor–acceptor interface cannot be predicted from cyclic voltammetry. Onsets for joint density of states and charge generation, reveal cases of energy uphill and – newly observed – downhill charge generation.

Energy level alignment in polymer organic solar cells at donor-acceptor planar junction formed by electrospray vacuum deposition

2014 ◽  
Vol 104 (16) ◽  
pp. 163303 ◽  
Author(s):  
Ji-Hoon Kim ◽  
Jong-Am Hong ◽  
Dae-Gyeon Kwon ◽  
Jaewon Seo ◽  
Yongsup Park
Keyword(s):  
Solar Cells ◽  
Energy Level ◽  
Organic Solar Cells ◽  
Vacuum Deposition ◽  
Energy Level Alignment ◽  
Donor Acceptor ◽  
Planar Junction

scholarly journals Diffusion-enhanced exciton dissociation in single-material organic solar cells

2021 ◽  
Vol 23 (37) ◽  
pp. 20848-20853
Author(s):  
Nong V. Hoang ◽  
Vasileios C. Nikolis ◽  
Lukasz Baisinger ◽  
Koen Vandewal ◽  
Maxim S. Pshenichnikov
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Domain Boundary ◽  
Exciton Dissociation ◽  
Dissociation Efficiency ◽  
Single Material

Multiple crossings at the domain boundary with different molecular orientations enhance the exciton dissociation efficiency in single-material organic solar cells.

New Anthracene‐Fused Nonfullerene Acceptors for High‐Efficiency Organic Solar Cells: Energy Level Modulations Enabling Match of Donor and Acceptor

2019 ◽  
Vol 9 (12) ◽  
pp. 1803541 ◽  
Author(s):  
Huanran Feng ◽  
Yuan‐Qiu‐Qiang Yi ◽  
Xin Ke ◽  
Jing Yan ◽  
Yamin Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Level ◽  
Organic Solar Cells ◽  
High Efficiency ◽  
Donor And Acceptor

scholarly journals Effects of Fluorination on Fused Ring Electron Acceptor for Active Layer Morphology, Exciton Dissociation, and Charge Recombination in Organic Solar Cells

2020 ◽  
Vol 12 (50) ◽  
pp. 56231-56239
Author(s):  
Licheng Hou ◽  
Jie Lv ◽  
Friso Wobben ◽  
Vincent M. Le Corre ◽  
Hua Tang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Active Layer ◽  
Electron Acceptor ◽  
Organic Solar Cells ◽  
Charge Recombination ◽  
Exciton Dissociation ◽  
Fused Ring
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