Dendronized Encapsulation with Hierarchical Rigidification Enabling Robust Solution Room‐Temperature Phosphorescence, Efficient Electroluminescence and Ultralong Afterglow
Bibliographic record
Abstract
Abstract Organic room‐temperature phosphorescence (RTP) materials face a fundamental challenge: their environment‐specific phosphorescent behavior fundamentally conflicts with the growing demand for multifunctional materials. To overcome this limitation, a multiscale confinement strategy is developed that integrates intramolecular flexible encapsulation with intermolecular rigid immobilization. Dendronized donor‐acceptor molecules are engineered with alkyl‐chain‐carbazole dendrons to achieve intramolecular encapsulation. This design enables abundant spatial interactions, balancing conformational flexibility (for solution processing) and emission rigidity. Multiscale confinement via molecular aggregation and poly(methyl methacrylate) (PMMA) doping further enhances rigidification. Together, these mechanisms suppress nonradiative transitions across four temporal orders of magnitude (10 −3 –10 0 s). The resulting material system exhibits unprecedented environment‐adaptive RTP properties: 1) ≈9 ms solution‐phase RTP lifetime under ambient conditions without deoxygenation, representing the longest lifetime among solution‐dissolved RTP systems; 2) 72% photoluminescence quantum yield in doped films and 17.2% external quantum efficiency in organic light‐emitting diodes (OLEDs), making them among the most efficient solution‐processed RTP‐OLEDs; 3) Ultralong afterglow with 1.16 s persistent RTP and 10 s naked‐eye‐detectable emission. Notably, this work represents the first demonstration of a single material simultaneously enabling solution‐phase RTP, high‐efficiency electroluminescence, and long afterglow. This intra/intermolecular engineering overcomes single‐environment limitations, establishing universal design principles for adaptive luminescent materials in various optoelectronic applications.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".