In 2022,Yang, Le; Chua, Xian Wei; Yang, Zhihong; Ding, Xiangpeng; Yu, Yong; Suwardi, Ady; Zhao, Meng; Ke, Karen Lin; Ehrler, Bruno; Di, Dawei published an article in Nanoscale Advances. The title of the article was 《Photon-upconverters for blue organic light-emitting diodes: a low-cost, sky-blue example》.Formula: C20H14O The author mentioned the following in the article:
In the research ecosystem’s quest towards having deployable organic light-emitting diodes with higher-energy emission (e.g., blue light), we advocate focusing on fluorescent emitters, due to their relative stability and color purity, and developing design strategies to significantly improve their efficiencies. We propose that all triplet-triplet annihilation upconversion (TTA-UC) emitters would make good candidates for triplet fusion-enhanced OLEDs (“”FuLEDs””), due to the energetically uphill nature of the photophys. process, and their common requirements. We demonstrate this with the low-cost sky-blue 1,3-diphenylisobenzofuran (DPBF). Having satisfied the criteria for TTA-UC, we show DPBF as a photon upconverter (Ith 92 mW cm-2), and henceforth demonstrate it as a bright emitter for FuLEDs. Notably, the devices achieved 6.5% external quantum efficiency (above the ∼5% threshold without triplet contribution), and triplet-exciton-fusion-generated fluorescence contributes up to 44% of the electroluminescence, as shown by transient measurements. Here, triplet fusion translates to a quantum yield (φ TTA-UC) of 19%, at an elec. excitation of ∼0.01 mW cm-2. The enhancement is meaningful for com. blue OLED displays. We also found DPBF to have decent hole mobilities of ∼0.08 cm2 V-1 s-1. This addnl. finding can lead to DPBF being used in other capacities in various printable electronics. In the experimental materials used by the author, we found 1,3-Diphenylisobenzofuran(cas: 5471-63-6Formula: C20H14O)
1,3-Diphenylisobenzofuran(cas: 5471-63-6) can be used as a fluorescent probe for detection of superoxide anion radical (O2−) inside the membrane lipid layer by DPBF fluorescence quenching method. 1,3-Diphenylisobenzofuran(DPBF) can be used as quencher during the photoinactivation of TA-3 mouse mammary carcinoma cells containing hematoporphyrin.Formula: C20H14O
Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem