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<p>Organic light-emitting diodes (OLEDs) inherently suffer from severe optical losses, with most generated photons confined by total internal reflection. To mitigate these losses, conventional light-extraction methods rely on complex, energy-intensive fabrication using non-biodegradable materials. Thus, this study presents an eco-friendly and biocompatible strategy that combines poly(butylene adipate-<i>co</i>-terephthalate) (PBAT) as a biodegradable template with carboxymethyl cellulose and tannic acid (ECO-UV) films. Templates and films were fabricated through a simple, low-temperature, solution-based replication process without lithography or vacuum processes, forming irregularly distributed microstructures that enhance light scattering and suppress internal reflection. The OLEDs incorporating the ECO-UV film exhibited up to 36% enhancement in electroluminescence intensity, demonstrating that even a fully biodegradable, solution-processed system can achieve light-extraction performance comparable to that of conventional synthetic counterparts.</p>

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Fully biocompatible poly(butylene adipate-co-terephthalate) based microstructures for eco-friendly light extraction in organic light-emitting diodes

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年2月26日

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  • Hyunjun Jang,
  • Sora Han,
  • Baeksang Sung,
  • Jooho Lee,
  • Sohee Jang,
  • Hyerin Kang,
  • Seoyeon Kim,
  • Jin-Wook Shin,
  • Jae-Hyun Lee,
  • Jeyoung Park,
  • Jonghee Lee

摘要

Organic light-emitting diodes (OLEDs) inherently suffer from severe optical losses, with most generated photons confined by total internal reflection. To mitigate these losses, conventional light-extraction methods rely on complex, energy-intensive fabrication using non-biodegradable materials. Thus, this study presents an eco-friendly and biocompatible strategy that combines poly(butylene adipate-co-terephthalate) (PBAT) as a biodegradable template with carboxymethyl cellulose and tannic acid (ECO-UV) films. Templates and films were fabricated through a simple, low-temperature, solution-based replication process without lithography or vacuum processes, forming irregularly distributed microstructures that enhance light scattering and suppress internal reflection. The OLEDs incorporating the ECO-UV film exhibited up to 36% enhancement in electroluminescence intensity, demonstrating that even a fully biodegradable, solution-processed system can achieve light-extraction performance comparable to that of conventional synthetic counterparts.