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Develop flexible, large-area, and transparent polymer-based films capable of efficient, color-tunable dual-mode organic afterglow for security and encryption applications.

March 22, 2022Angewandte Chemie International Edition

Efficient and Color‐Tunable Dual‐Mode Afterglow from Large‐Area and Flexible Polymer‐Based Transparent Films for Anti‐Counterfeiting and Information Encryption

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Develop flexible, large-area, and transparent polymer-based films capable of efficient, color-tunable dual-mode organic afterglow for security and encryption applications.
Synthesized two indolocarbazole derivatives, IaCzA and IbCzA.
Doped the synthesized derivatives into poly(vinyl alcohol) (PVA) matrices to produce flexible, transparent films.
Evaluated optical properties, afterglow duration, luminescence quantum yield, and temperature-dependent color shifting.
Films achieved dual-mode afterglow combining persistent thermally activated delayed fluorescence and ultralong organic phosphorescence.
IbCzA-doped PVA film exhibited intense blue afterglow with an afterglow quantum yield of 19.8% and a lifetime of 1.81 s.
Emission color varied linearly with temperature, enabling successful application as temperature-sensitive security inks for anti-counterfeiting.

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Implication

Experimental study demonstrates efficient temperature-tunable dual-mode afterglow in flexible polymer films, highlighting strong utility for advanced anti-counterfeiting and security encryption.

Cite This Study

Yang et al. (2022) studied this question.

synapsesocial.com/papers/69d733de8e958094d1b8a400 https://doi.org/10.1002/anie.202201820

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Implication

Experimental study demonstrates efficient temperature-tunable dual-mode afterglow in flexible polymer films, highlighting strong utility for advanced anti-counterfeiting and security encryption.

Efficient and Color‐Tunable Dual‐Mode Afterglow from Large‐Area and Flexible Polymer‐Based Transparent Films for Anti‐Counterfeiting and Information Encryption

Key Points

Discussion

Implication

Cite This Study

Efficient and Color‐Tunable Dual‐Mode Afterglow from Large‐Area and Flexible Polymer‐Based Transparent Films for Anti‐Counterfeiting and Information Encryption

Key Points

Discussion

Implication

Cite This Study

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