Energy level modulation of non-fullerene acceptors enables efficient organic solar cells with small energy loss

2018 ◽  
Vol 6 (6) ◽  
pp. 2468-2475 ◽  
Author(s):  
Qiaoshi An ◽  
Wei Gao ◽  
Fujun Zhang ◽  
Jian Wang ◽  
Miao Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Level ◽  
Energy Loss ◽  
Organic Solar Cells ◽  
Small Energy

BDTThIT-M based OSCs achieved a high PCE of 12.12% with a small energy loss of ∼0.588 eV.

Highly efficient halogen-free solvent processed small-molecule organic solar cells enabled by material design and device engineering

2017 ◽  
Vol 10 (8) ◽  
pp. 1739-1745 ◽  
Author(s):  
Jiahui Wan ◽  
Xiaopeng Xu ◽  
Guangjun Zhang ◽  
Ying Li ◽  
Kui Feng ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Loss ◽  
Small Molecules ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Material Design ◽  
Small Energy ◽  
Highly Efficient ◽  
Device Engineering ◽  
Halogen Free

Naphtho[1,2-c:5,6-c']bis[1,2,5]thiadiazole-based small molecules have been synthesized for organic solar cells. The optimized devices processed by a halogen-free solvent of CS2 exhibited a PCE of 11.53% with a small energy loss of 0.57 eV.

Indole-based A–DA′D–A type acceptor-based organic solar cells achieve efficiency over 15 % with low energy loss

2020 ◽  
Vol 4 (12) ◽  
pp. 6203-6211
Author(s):  
Yu Chen ◽  
Rui Cao ◽  
Hui Liu ◽  
M. L. Keshtov ◽  
Emmanuel N. Koukaras ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Loss ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
High Performance ◽  
Power Conversion ◽  
Low Energy ◽  
Charge Generation ◽  
Small Energy ◽  
Efficient Charge

In order to increase the power conversion efficiency (PCE) of organic solar cells, developing high-performance non-fullerene small molecule acceptors is important for efficient charge generation and small energy loss.

A benzo[1,2-d:4,5-d′]bisthiazole-based wide-bandgap copolymer semiconductor for efficient fullerene-free organic solar cells with a small energy loss of 0.50 eV

2019 ◽  
Vol 7 (10) ◽  
pp. 5234-5238 ◽  
Author(s):  
Nai-Yu Chen ◽  
Qihui Yue ◽  
Wenrui Liu ◽  
Hao-Li Zhang ◽  
Xiaozhang Zhu
Keyword(s):  
Solar Cells ◽  
Energy Loss ◽  
Organic Solar Cells ◽  
Wide Bandgap ◽  
Low Energy ◽  
Small Energy ◽  
Wide Bandgap Polymer

A wide-bandgap polymer donor based on benzo[1,2-d:4,5-d′]bisthiazole is designed and synthesized delivering a PCE of 11.08% with a low energy loss of 0.50 eV.

A stereoregular β-dicyanodistyrylbenzene (β-DCS)-based conjugated polymer for high-performance organic solar cells with small energy loss and high quantum efficiency

2017 ◽  
Vol 5 (32) ◽  
pp. 16681-16688 ◽  
Author(s):  
Jun-Mo Park ◽  
Dong Won Kim ◽  
Hae Yeon Chung ◽  
Ji Eon Kwon ◽  
Seung Hwa Hong ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Loss ◽  
Quantum Efficiency ◽  
Organic Solar Cells ◽  
Conjugated Polymer ◽  
High Performance ◽  
Small Energy ◽  
High Quantum Efficiency ◽  
High Quantum

We report a new β-dicyanodistyrylbenzene (β-DCS)-based polymer (PBDCS), which enables efficient fullerene and non-fullerene organic solar cells with low Eloss and high EQE.

Small energy loss in ternary organic solar cells with a blend of cascade energy levels: two fullerene-free acceptors as the electron acceptor

2019 ◽  
Vol 7 (32) ◽  
pp. 10039-10048 ◽  
Author(s):  
Zhiyong Liu ◽  
Ning Wang
Keyword(s):  
Solar Cells ◽  
Energy Loss ◽  
Electron Acceptor ◽  
Organic Solar Cells ◽  
Energy Levels ◽  
Wide Bandgap ◽  
Small Energy ◽  
Cascade Energy

Fullerene-free organic solar cells (OSCs) were fabricated using a blend of wide bandgap donor PBDB-T and ultranarrow bandgap acceptor IEICO-4F as binary photoactive layers.

High-Performance and Low-Energy Loss Organic Solar Cells with Non-fused Ring Acceptor by Alkyl Chain Engineering

2021 ◽  
pp. 129768
Author(s):  
Dou Luo ◽  
Xue Lai ◽  
Nan Zheng ◽  
Chenghao Duan ◽  
Zhaojin Wang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Loss ◽  
Organic Solar Cells ◽  
High Performance ◽  
Alkyl Chain ◽  
Low Energy ◽  
Fused Ring

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.

scholarly journals Reducing Energy Loss in Organic Solar Cells by Changing the Central Metal in Metalloporphyrins

ChemSusChem ◽  
2021 ◽  
Author(s):  
Virginia Cuesta ◽  
Rahul Singhal ◽  
Pilar Cruz ◽  
Ganesh D. Sharma ◽  
Fernando Langa
Keyword(s):  
Solar Cells ◽  
Energy Loss ◽  
Organic Solar Cells ◽  
Central Metal ◽  
Reducing Energy

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.

Revealing the role of solvent additives on morphology and energy loss in benzodifuran polymer based non-fullerene organic solar cells

2021 ◽  
Author(s):  
Zhi Zheng ◽  
Enfang He ◽  
Jie Wang ◽  
Zhaotong Qin ◽  
Tianqi Niu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Loss ◽  
Organic Solar Cells ◽  
Opposite Effect ◽  
Effective Strategy ◽  
Highly Efficient ◽  
Solvent Additive ◽  
Role Of Solvent

Solvent additive (SA) treatment is the most effective strategy to obtain highly efficient non-fullerene organic solar cells (NF-OSCs). However, NF-OSCs with SA treatment usually exhibits different or even opposite effect...

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