Study on Photo-Degradation of Inverted Organic Solar Cells Caused by Generation of Potential Barrier between PEDOT:PSS and PBDB-Ts

We investigated that photo-stability of PBDB-T, which is a good donor material for state-of-the-art high-performance organic solar cells (OSCs), in OSCs under prolonged photo-irradiation. PBDB-T itself did not decompose upon...

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An Effective D-π-A Type Donor Material Based on 4-Fluorobenzoylacetonitrile Core Unit for Bulk Heterojunction Organic Solar Cells

Applied Sciences ◽

10.3390/app11020646 ◽

2021 ◽

Vol 11 (2) ◽

pp. 646

Author(s):

Shabaz Alam ◽

M. Shaheer Akhtar ◽

Abdullah ◽

Eun-Bi Kim ◽

Hyung-Shik Shin ◽

...

Keyword(s):

Solar Cells ◽

Molecular Orbital ◽

Organic Solar Cells ◽

High Performance ◽

Bulk Heterojunction ◽

Energy Levels ◽

Photovoltaic Properties ◽

Donor Material ◽

Highest Occupied Molecular Orbital ◽

Lowest Unoccupied Molecular Orbital

In order to develop new and effective donor materials, a planar donor-π-acceptor (D-π-A) type small organic molecule (SOM), 2-(4-fluorobenzoyl)-3-(5″-hexyl-[2,2′:5′,2″-terthiophen]-5-yl) acrylonitrile, named as H3T-4-FOP, was synthesized by the reaction of 4-fluorobenzoylacetonitrile (as acceptor unit) and hexyl terthiophene (as donor unit) derivatives. Promising optical, solubility, electronic and photovoltaic properties were observed for the H3T-4-FOP SOM. Significantly, the presence of 4-fluorobenzoylacetonitrile as an acceptor unit in H3T-4-FOP SOM tuned the optical band gap to ~2.01 eV and procured the reasonable energy levels as highest occupied molecular orbital (HOMO) of −5.27 eV and lowest unoccupied molecular orbital (LUMO) −3.26 eV. The synthesized H3T-4-FOP SOM was applied as a donor material to fabricate solution-processed bulk heterojunction organic solar cells (BHJ-OSCs) with an active layer of H3T-4-FOP: PC61BM (1:2, w/w) and was validated as having a good power conversion efficiency (PCE) of ~4.38%. Our studies clearly inspire for future designing of multifunctional groups containing the 4-fluorobenzoylacetonitrile based SOM for high performance BHJ-OSCs.

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The role of chemical structure in indacenodithienothiophene-alt-benzothiadiazole copolymers for high performance organic solar cells with improved photo-stability through minimization of burn-in loss

Journal of Materials Chemistry A ◽

10.1039/c7ta09224e ◽

2017 ◽

Vol 5 (47) ◽

pp. 25064-25076 ◽

Cited By ~ 15

Author(s):

Christos L. Chochos ◽

Nicolas Leclerc ◽

Nicola Gasparini ◽

Nicolas Zimmerman ◽

Elisavet Tatsi ◽

...

Keyword(s):

Solar Cells ◽

Solar Cell ◽

Organic Solar Cells ◽

Organic Solar Cell ◽

High Performance ◽

Chemical Structure ◽

Rational Design ◽

Photo Stability

The organic solar cell initial burn-in loss is suppressed via the rational design of the polymer's chemical structure.

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Developing high-performance small molecule organic solar cells via a large planar structure and an electron-withdrawing central unit

Chemical Communications ◽

10.1039/c6cc07927j ◽

2017 ◽

Vol 53 (2) ◽

pp. 451-454 ◽

Cited By ~ 16

Author(s):

Hongtao Zhang ◽

Yongtao Liu ◽

Yanna Sun ◽

Miaomiao Li ◽

Bin Kan ◽

...

Keyword(s):

Solar Cells ◽

Small Molecule ◽

Organic Solar Cells ◽

Building Block ◽

High Performance ◽

Planar Structure ◽

Central Unit ◽

Donor Material

We designed and synthesized a new small molecule donor material named DR3TBDD using an electron-withdrawing unit BDD as the central building block. A PCE of 9.53% with a highVocof around 1 V was achieved.

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

Chemical Engineering Journal ◽

10.1016/j.cej.2021.129768 ◽

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

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A Facile Synthesized Polymer Featuring B‐N Covalent Bond and Small Singlet‐Triplet Gap for High‐Performance Organic Solar Cells

Angewandte Chemie International Edition ◽

10.1002/anie.202016265 ◽

2021 ◽

Vol 60 (16) ◽

pp. 8813-8817

Author(s):

Shuting Pang ◽

Zhiqiang Wang ◽

Xiyue Yuan ◽

Langheng Pan ◽

Wanyuan Deng ◽

...

Keyword(s):

Solar Cells ◽

Organic Solar Cells ◽

High Performance ◽

Covalent Bond

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High performance tandem organic solar cells via a strongly infrared-absorbing narrow bandgap acceptor

Nature Communications ◽

10.1038/s41467-020-20431-6 ◽

2021 ◽

Vol 12 (1) ◽

Author(s):

Zhenrong Jia ◽

Shucheng Qin ◽

Lei Meng ◽

Qing Ma ◽

Indunil Angunawela ◽

...

Keyword(s):

Solar Cells ◽

Power Conversion Efficiency ◽

Conversion Efficiency ◽

Organic Solar Cells ◽

High Performance ◽

Short Circuit ◽

Power Conversion ◽

High Power Conversion Efficiency ◽

Device Structure ◽

Narrow Bandgap

AbstractTandem organic solar cells are based on the device structure monolithically connecting two solar cells to broaden overall absorption spectrum and utilize the photon energy more efficiently. Herein, we demonstrate a simple strategy of inserting a double bond between the central core and end groups of the small molecule acceptor Y6 to extend its conjugation length and absorption range. As a result, a new narrow bandgap acceptor BTPV-4F was synthesized with an optical bandgap of 1.21 eV. The single-junction devices based on BTPV-4F as acceptor achieved a power conversion efficiency of over 13.4% with a high short-circuit current density of 28.9 mA cm−2. With adopting BTPV-4F as the rear cell acceptor material, the resulting tandem devices reached a high power conversion efficiency of over 16.4% with good photostability. The results indicate that BTPV-4F is an efficient infrared-absorbing narrow bandgap acceptor and has great potential to be applied into tandem organic solar cells.

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