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関連する概念動画

Photochemical Electrocyclic Reactions: Stereochemistry01:26

Photochemical Electrocyclic Reactions: Stereochemistry

1.9K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
1.9K
π Electron Effects on Chemical Shift: Overview01:27

π Electron Effects on Chemical Shift: Overview

1.1K
An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0,...
1.1K
π Molecular Orbitals of 1,3-Butadiene01:24

π Molecular Orbitals of 1,3-Butadiene

9.7K
Conjugated dienes have lower heats of hydrogenation than cumulated and isolated dienes, making them more stable. The enhanced stabilization of conjugated systems can be understood from their π molecular orbitals.
The simplest conjugated diene is 1,3-butadiene: a four-carbon system where each carbon is sp2-hybridized and has an unhybridized p orbital that contains an unpaired electron. According to molecular orbital theory, atomic orbitals combine to form molecular orbitals such that the number...
9.7K
Thermal Electrocyclic Reactions: Stereochemistry01:17

Thermal Electrocyclic Reactions: Stereochemistry

2.1K
The stereochemistry of electrocyclic reactions is strongly influenced by the orbital symmetry of the polyene HOMO. Under thermal conditions, the reaction proceeds via the ground-state HOMO.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
2.1K
Induced Electric Dipoles01:28

Induced Electric Dipoles

4.4K
A permanent electric dipole orients itself along an external electric field. This rotation can be quantified by defining the potential energy because the external torque does work in rotating it. Then, the potential energy is minimum at the parallel configuration and maximum at the antiparallel configuration. While the former is a stable equilibrium, the latter is an unstable equilibrium.
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
4.4K
π Electron Effects on Chemical Shift: Aromatic and Antiaromatic Compounds01:14

π Electron Effects on Chemical Shift: Aromatic and Antiaromatic Compounds

1.3K
In aromatic compounds, such as benzene, the circulation of (4n + 2) π-electrons sets up a diamagnetic or diatropic ring current around the perimeter of the molecule. This current induces a magnetic field that opposes the external field inside the ring and reinforces it on the outside. The protons in benzene are deshielded and exhibit high chemical shifts in the range 6.5–8.5 ppm. The shielding effect at the center of the ring is evident in complex aromatic molecules, such as...
1.3K
このページは機械翻訳されています。他のページは英語で表示される場合があります。View in English
  1. ホーム
  3. 研究分野
  5. エンジニアリング
  7. 化学工学
  9. 電気化学エネルギー貯蔵と変換
  11. 3d結合非平面ビフェニルサイドチェーン:効率的な有機太陽電池における負の静電電位を誘発するにおけるそれらの独占的な役割

3D結合非平面ビフェニルサイドチェーン:効率的な有機太陽電池における負の静電電位を誘発するにおけるそれらの独占的な役割

Seonghun Jeong1, Zhe Sun1, Yongjoon Cho1

  • 1School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulju-gun, Ulsan, 44919, South Korea.

Small (Weinheim an der Bergstrasse, Germany)
|August 29, 2025

関連する実験動画

Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer
08:29

Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer

Published on: January 10, 2017

9.2K
Monitoring the Effects of Illumination on the Structure of Conjugated Polymer Gels Using Neutron Scattering
06:16

Monitoring the Effects of Illumination on the Structure of Conjugated Polymer Gels Using Neutron Scattering

Published on: December 21, 2017

5.8K
In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation
06:49

In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation

Published on: March 2, 2021

6.3K

PubMed で要約を見る

まとめ
この要約は機械生成です。

有機太陽電池 (OSC) の非フルレン受容体 (NFAs) にビフェニル側鎖を導入すると,エネルギー損失が減少する. この分子設計は,非放射性エネルギーの損失を最小限に抑えることで,電力変換効率 (PCE) を高めます.

科学分野:

  • 材料科学
  • オーガニック電子
  • 太陽光発電

背景:

  • 非フルレン受容体 (NFA) ベースの有機太陽電池 (OSC) で高電力変換効率 (PCE) を達成するには,エネルギー損失,特に非放射性エネルギー損失を最小限に抑えることが必要です.
  • エネルギー損失の最適化のための現在の分子設計戦略は複雑です.

研究 の 目的:

  • YシリーズのNFAに3D結合非平面バイフェニルサイドチェーンを導入することで,分子特性とOSC性能への影響を調査する.
  • 高性能OSCにおけるエネルギー損失を最適化するためのよりシンプルな分子設計アプローチを開発する.

主な方法:

  • 新しいNFA (BPY) をバイフェニルサイドチェーンで合成.
  • PM6:BPYとPM6:Y6の混合物を用いたOSCの製造と特徴付け
  • 分子間相互作用,静電電位,および電荷ダイナミクスの分析.

主要な成果:

  • BPYベースのOSCは,Y6ベースのOSCと比較して優れた性能を示した.
  • バイフェニルサイドチェーンの導入は分子間相互作用と充電ダイナミクスを強化した.
  • ターナリーOSC (BPY添加物付きPM6:BTP-eC9) は,オープン回路の電圧と充填因子の改善により,PCEの19.23%を達成しました.
キーワード:
ビフェニルサイドチェーン静電電位非フルレンの受容体

関連する実験動画

Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer
08:29

Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer

Published on: January 10, 2017

9.2K
Monitoring the Effects of Illumination on the Structure of Conjugated Polymer Gels Using Neutron Scattering
06:16

Monitoring the Effects of Illumination on the Structure of Conjugated Polymer Gels Using Neutron Scattering

Published on: December 21, 2017

5.8K
In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation
06:49

In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation

Published on: March 2, 2021

6.3K
  • 非放射性エネルギーの損失を最小限に抑えることが観察され,これは弱まったπ-πスタッキングに起因する.

    • 結論:

    • ビフェニル側鎖は,NFAの性質を効果的に調節し,分子間相互作用を改善し,エネルギー損失を減らす.
    • この分子設計は 高い性能の有機太陽電池の開発に 有望な戦略を提供します
    • この研究は,効率的なOSCのために非放射性エネルギーの損失を最適化するための洞察を提供します.
    非放射性エネルギー損失
    有機太陽電池