期刊論文
| 學年 | 108 |
|---|---|
| 學期 | 2 |
| 出版（發表）日期 | 2020-06-11 |
| 作品名稱 | Highly Efficient Near-Infrared Electroluminescence up to 800 nm Using Platinum(II) Phosphors |
| 作品名稱（其他語言） | |
| 著者 | Hsu, Hsiu-fu |
| 單位 | |
| 出版者 | |
| 著錄名稱、卷期、頁數 | Advanced Functional Materials 30(30), 2002173 |
| 摘要 | Near-infrared organic light-emitting diodes (NIR OLEDs) enable many unique applications ranging from night-vision displays and photodynamic therapies. However, the development of efficient NIR OLEDs with a low efficiency roll-off is still challenging. Here, a series of new heteroleptic Pt(II) complexes (1–4) flanked by both pyridyl pyrimidinate and functional azolate chelates are synthesized. The reduced ππ* energy gap of the pyridyl pyrimidinate chelate, and strong intermolecular interaction and high crystallinity in vacuum-deposited thin films engender strong intermolecular charge transfer transition including metal–metal-to-ligand charge transfer; thereby, exhibiting efficient photoluminescence within 776–832 nm and short radiative lifetimes of 0.52–0.79 µs. Consequently, nondoped NIR-emitting OLEDs based on these Pt(II) complexes are fabricated, to which Pt(II) complexes 2 and 4 give record high maximum external quantum efficiency of 10.61% at 794 nm and 9.58% at 803 nm, respectively. Moreover, low efficiency roll-off is also observed, among which the device efficiencies of 2 and 4 are at least four times higher than that of the best NIR-emitting OLEDs recorded at current density of 100 mA cm−2. |
| 關鍵字 | emission;N-donor;near-infrared;platinum;pyrazole;pyrimidine;stacking interaction |
| 語言 | zh_TW |
| ISSN | 1616-3028 |
| 期刊性質 | 國內 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | 否 |
| 國別 | TWN |
| 公開徵稿 | |
| 出版型式 | ,電子版 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/124303 ) |