論文要約：OLED exciplex Selected Papers 2025.10.05

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Table of Contents

論文要約（JP/EN）3本セット

From Donor-Donor Exciplex-Forming Interfaces to Detection of an Explosive Compound with Phenylethenyl Derivatives Redefining OLED Efficiency and Extremely High Sensitivity to Picric Acid

Rashid, EU; Cekaviciute, M; Simokaitiene, J; Ghasemi, M; Volyniuk, D; Ivaniuk, K; Stakhira, P; Grazulevicius, JV / ACS APPLIED ELECTRONIC MATERIALS (2025) / DOI: https://doi.org/10.1021/acsaelm.5c00123

概要 / Overview

ドナー–ドナー界面で形成するエキシプレックスを活用し、界面設計による発光効率化とピクリン酸高感度検出を両立。空間配置や相互作用を分子設計で制御しました。

ここがポイント / Key Points

    1. ドナー–ドナー界面エキシプレックス
    1. 高効率発光と高感度（ピクリン酸）検出
    1. 空間分子配置の設計指針

設計と機能 / Design & Function

  • 設計：材料・界面・濃度設計により励起/輸送の経路を最適化
  • 機能：発光効率、立ち上がり電圧、感度のバランス改善
  • 特長：エキシプレックス/多RISC/ドーパントレス等の指針を提示

用語ミニ解説 / Mini Glossary

  • Exciplex：励起錯体。界面/バルクで電子供与体と受容体の相互作用により発光状態が形成される。
  • RISC：逆項間交差。T1→S1 への熱活性化遷移。

参考文献 / References

  1. ACS APPLIED ELECTRONIC MATERIALS (2025). DOI: https://doi.org/10.1021/acsaelm.5c00123

2) 日本語版

New derivatives of N,N′-bis(naphthalen-1-yl)-N,N′-bis(phenyl)benzidine for dopant-free organic light emitting diodes with low turn-on voltages

Bucinskas, A; Bezvikonnyi, O; Danyliv, I; Ivaniuk, K; Kutsiy, S; Volyniuk, D; Rashid, EU; Giedraityte, S; Stakhira, P; Grazulevicius, JV / OPTICAL MATERIALS (2025) / DOI: https://doi.org/10.1016/j.optmat.2025.117467

概要 / Overview

N,N′-ビス(ナフチル)‐N,N′-ビス(フェニル)ベンジジン（NPB）誘導体を設計し、ドーパントレスOLEDで低ターンオン電圧と高効率を両立。障壁なしの電荷輸送を志向した分子骨格最適化を示しました。

ここがポイント / Key Points

    1. NPB誘導体ベースのドーパントレスOLED
    1. 低ターンオン電圧（平滑な障壁レス輸送）
    1. 発光効率と安定性の両立

設計と機能 / Design & Function

  • 設計：材料・界面・濃度設計により励起/輸送の経路を最適化
  • 機能：発光効率、立ち上がり電圧、感度のバランス改善
  • 特長：エキシプレックス/多RISC/ドーパントレス等の指針を提示

用語ミニ解説 / Mini Glossary

  • Exciplex：励起錯体。界面/バルクで電子供与体と受容体の相互作用により発光状態が形成される。
  • RISC：逆項間交差。T1→S1 への熱活性化遷移。

参考文献 / References

  1. OPTICAL MATERIALS (2025). DOI: https://doi.org/10.1016/j.optmat.2025.117467

3) 日本語版

The analysis of the electroluminescence performance of multi-RISC channel single-emissive-layer organic light-emitting diode

Wanghe, R; Jia, ZY; Wang, GY / ORGANIC ELECTRONICS (2025) / DOI: https://doi.org/10.1016/j.orgel.2025.107323

概要 / Overview

単一発光層OLEDにおける多チャネルRISC戦略を、実験・MD・量子化学計算で解析。発光層のドーピング濃度が再結合順序等を通じて発光特性に与える影響を体系化しました。

ここがポイント / Key Points

    1. 単一EML×多RISCの包括解析
    1. ドーピング濃度が再結合順序・発光に与える影響
    1. MD＋量子化学でメカニズム可視化

設計と機能 / Design & Function

  • 設計：材料・界面・濃度設計により励起/輸送の経路を最適化
  • 機能：発光効率、立ち上がり電圧、感度のバランス改善
  • 特長：エキシプレックス/多RISC/ドーパントレス等の指針を提示

用語ミニ解説 / Mini Glossary

  • Exciplex：励起錯体。界面/バルクで電子供与体と受容体の相互作用により発光状態が形成される。
  • RISC：逆項間交差。T1→S1 への熱活性化遷移。

参考文献 / References

  1. ORGANIC ELECTRONICS (2025). DOI: https://doi.org/10.1016/j.orgel.2025.107323

English versions

From Donor-Donor Exciplex-Forming Interfaces to Detection of an Explosive Compound with Phenylethenyl Derivatives Redefining OLED Efficiency and Extremely High Sensitivity to Picric Acid

Rashid, EU; Cekaviciute, M; Simokaitiene, J; Ghasemi, M; Volyniuk, D; Ivaniuk, K; Stakhira, P; Grazulevicius, JV / ACS APPLIED ELECTRONIC MATERIALS (2025) / DOI: https://doi.org/10.1021/acsaelm.5c00123

Overview

In this study, three derivatives of phenylethenyl-substituted phenoxazine and phenothiazine are synthesized via Buchwald-Hartwig cross-coupling, targeting multifunctionality as exciplex-forming materials and efficient cyan emitters for organic light-emitting diodes (OLEDs) and sensitive dectectors of picric acid. Advanced density functional theory (DFT) calculations at the mPW1PW91/6-31G(d,p) level unveil the intricate electronic architectures of these compounds, emphasizing their spatial molecular orbitals and the charge-transfer dynamics governing excited-state properties. Reorganization ene

Key Points

    1. Donor–donor interfacial exciplexes
    1. High OLED efficiency & ultra-sensitive picric acid sensing
    1. Design rules via spatial molecular architectures

Design & Function

  • Design: Optimize materials/interface/doping to tune exciton and carrier pathways
  • Function: Improve EL efficiency, turn-on voltage and/or sensing
  • Feature: Practical rules for exciplex / multi-RISC / dopant-free designs

Mini Glossary

  • Exciplex — An excited-state complex formed at donor–acceptor interfaces.
  • RISC — Reverse intersystem crossing (T1→S1).

References

  1. ACS APPLIED ELECTRONIC MATERIALS (2025). DOI: https://doi.org/10.1021/acsaelm.5c00123

New derivatives of N,N′-bis(naphthalen-1-yl)-N,N′-bis(phenyl)benzidine for dopant-free organic light emitting diodes with low turn-on voltages

Bucinskas, A; Bezvikonnyi, O; Danyliv, I; Ivaniuk, K; Kutsiy, S; Volyniuk, D; Rashid, EU; Giedraityte, S; Stakhira, P; Grazulevicius, JV / OPTICAL MATERIALS (2025) / DOI: https://doi.org/10.1016/j.optmat.2025.117467

Overview

N,N ‘-bis(naphthalen-1-yl)-N,N ‘-bis(phenyl)benzidine (NPB) is a hole-transporter widely used in optoelectronic devices due to the low energetic disorder of its layers, high drift mobility of holes and suitable energy levels. In this work, new hole-transporting derivatives of NPB are developed with the aim of achieving lower ionization energies and the smooth transport of holes to the recombination sites of organic light-emitting diodes (OLEDs). Aiming at low turn-on voltages and enhanced efficiency and stability of the devices, electron-donating methoxy and dimethylamine groups are attached t

Key Points

    1. Dopant-free OLEDs based on NPB derivatives
    1. Low turn-on voltage via smooth barrierless transport
    1. Balanced efficiency and stability

Design & Function

  • Design: Optimize materials/interface/doping to tune exciton and carrier pathways
  • Function: Improve EL efficiency, turn-on voltage and/or sensing
  • Feature: Practical rules for exciplex / multi-RISC / dopant-free designs

Mini Glossary

  • Exciplex — An excited-state complex formed at donor–acceptor interfaces.
  • RISC — Reverse intersystem crossing (T1→S1).

References

  1. OPTICAL MATERIALS (2025). DOI: https://doi.org/10.1016/j.optmat.2025.117467

The analysis of the electroluminescence performance of multi-RISC channel single-emissive-layer organic light-emitting diode

Wanghe, R; Jia, ZY; Wang, GY / ORGANIC ELECTRONICS (2025) / DOI: https://doi.org/10.1016/j.orgel.2025.107323

Overview

With the advancement of technology, an increasing number of high efficiency organic light-emitting diode (OLED) devices utilizing multi-reverse intersystem crossing (RISC) channels have been reported. The multi-RISC channel strategy has emerged as a highly feasible OLED design approach. However, the analysis of multi-RISC channel single-emissive-layer OLEDs still faces numerous challenges due to the presence of multiple different kinds of molecules in the EML. Herein, based on experiments, molecular dynamics (MD) simulations, and quantum chemical calculations, a systematic analysis has been co

Key Points

    1. Single-EML with multi-RISC channels
    1. Doping concentration governs recombination order & EL
    1. Mechanism clarified via MD and quantum chemistry

Design & Function

  • Design: Optimize materials/interface/doping to tune exciton and carrier pathways
  • Function: Improve EL efficiency, turn-on voltage and/or sensing
  • Feature: Practical rules for exciplex / multi-RISC / dopant-free designs

Mini Glossary

  • Exciplex — An excited-state complex formed at donor–acceptor interfaces.
  • RISC — Reverse intersystem crossing (T1→S1).

References

  1. ORGANIC ELECTRONICS (2025). DOI: https://doi.org/10.1016/j.orgel.2025.107323

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