Sb3+-doped terbium-based metal halide with efficient dual band emission for ratiometric temperature sensing
Bibliographic record
Abstract
Low-dimensional organic-inorganic hybrid metal halides (HMH) have attracted widespread attention due to their tunable chemical composition and exceptional optoelectronic properties. However, there are only limited numbers of reports about lanthanide elements-based metal halides. Herein, we synthesize a zero-dimensional (0D) metal halide, (DFPD) 4 TbCl 7 (DFPD = 4,4-difluoropiperidinium), which exhibits intrinsic emission from the lanthanide ion (Tb 3+ ). Interestingly, by doping a small amount of Sb 3+ , an additional emission peak emerged at 625 nm. Apart from the dual band photoluminescence (PL), the photoluminescence quantum yield (PLQY) is increased from ~40% to near unity (99.6%) after doping (DFPD) 4 TbCl 7 HMH with Sb 3+ . To reveal the enhanced PLQY and dual band emission in (DFPD) 4 TbCl 7 :Sb 3+ , we carried out temperature-dependent PL measurements and density functional theory (DFT) calculation. We found the observed dual-band emission originated from intrinsic emission of Tb and self-trapped exciton (STEs) emission, which is introduced by the [SbCl 6 ] 3− octahedron. The extra radiative channel introduced by STEs contributes to the enhanced PLQY. Taking advantage of the efficient PL and high stability of (DFPD) 4 TbCl 7 :Sb 3+ , we fabricated a stable white-light-emitting diode with a color rendering index of 93. Furthermore, the temperature dependent PL of (DFPD) 4 TbCl 7 :Sb 3+ ensures its application as active material for optical thermometry. Our work provides a new strategy for developing lanthanide-based HMH with high performance for light emitting applications.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.000 | 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 | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 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".