Issue

Vol. 18 (2026)

Bioinspired Precision Peeling of Ultrathin Bamboo Green Cellulose Frameworks for Light Management in Optoelectronics

https://doi.org/10.1007/s40820-025-01867-1
Yan Wang
College of Materials and Energy, Central South University of Forestry and Technology, Changsha 410004, Hunan, People’s Republic of China
Yuan Zhang
College of Materials and Energy, Central South University of Forestry and Technology, Changsha 410004, Hunan, People’s Republic of China
Yingfeng Zuo
College of Materials and Energy, Central South University of Forestry and Technology, Changsha 410004, Hunan, People’s Republic of China
Dawei Zhao
Key Laboratory On Resources Chemicals and Materials of Ministry of Education, Shenyang University of Chemical Technology, Shenyang 110142, Liaoning, People’s Republic of China
Yiqiang Wu
College of Materials and Energy, Central South University of Forestry and Technology, Changsha 410004, Hunan, People’s Republic of China

Corresponding Author: Yiqiang Wu

wuyq0506@126.com

Nano-Micro Letters, Vol. 18 (2026), Article Number: 19

Abstract

Cellulose frameworks have emerged as promising materials for light management due to their exceptional light-scattering capabilities and sustainable nature. Conventional biomass-derived cellulose frameworks face a fundamental trade-off between haze and transparency, coupled with impractical thicknesses (≥ 1 mm). Inspired by squid’s skin-peeling mechanism, this work develops a peroxyformic acid (HCOOOH)-enabled precision peeling strategy to isolate intact 10-µm-thick bamboo green (BG) frameworks—100 × thinner than wood-based counterparts while achieving an unprecedented optical performance (88% haze with 80% transparency). This performance surpasses delignified biomass (transparency < 40% at 1 mm) and matches engineered cellulose composites, yet requires no energy-intensive nanofibrillation. The preserved native cellulose I crystalline structure (64.76% crystallinity) and wax-coated uniaxial fibril alignment (Hermans factor: 0.23) contribute to high mechanical strength (903 MPa modulus) and broadband light scattering. As a light-management layer in polycrystalline silicon solar cells, the BG framework boosts photoelectric conversion efficiency by 0.41% absolute (18.74% → 19.15%), outperforming synthetic anti-reflective coatings. The work establishes a scalable, waste-to-wealth route for optical-grade cellulose materials in next-generation optoelectronics.


Highlights:
1 First successful peeling of bamboo green into micrometer-scale optical films (10 μm) via a bioinspired peroxyformic acid strategy, achieving intact preservation of monolayer cellular structure.
2 Scalable and stable peeling process enables high-yield production of bamboo green frameworks, demonstrating significant potential for sustainable optical material applications.
3 Experimental validation in light management shows 0.41% absolute photoelectric conversion efficiency enhancement in solar cells, proving practical value as high-performance optical films.

Keywords

Bamboo green Cellulose framework Chemical peeling Optical properties Light management
Wang, Yan, Yuan Zhang, Yingfeng Zuo, Dawei Zhao, and Yiqiang Wu. 2025. “Bioinspired Precision Peeling of Ultrathin Bamboo Green Cellulose Frameworks for Light Management in Optoelectronics”. Nano-Micro Letters 18 (August):19. https://doi.org/10.1007/s40820-025-01867-1.
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