6‐2: Invited Paper: Innovative Technological Progress of Lifetime in Hyperfluorescence™

Abstract

Hyperfluorescence™ (HF) combines TADF and fluorescence to provide narrow emission spectrum with four times higher emission efficiency than fluorescence. TADF acts as excitons generator and transfers excitons to fluorescence by Förster resonance energy transfer (FRET). HF also achieved long enough lifetime for AMOLED applications, such as smartphone not only by durable molecules but also by controlling charge balances in Emissive Layer (EML).

61‐1: Heuristics of OLED and Micro LED Efficiencies

“…The EQEs for red, green, and blue OLEDs based on the state-ofthe-art "product" OLED power efficiency shown in Figure 2 are below the envelope curve in Figure 5. This may be understood given the reported difficulties associated with achieving maximum EQE and maximum lifetime at the same time [11][12][13][14][15]. curve by 2, a heuristic that is based on experimental observations [28,32].…”

“…Next generation OLED displays demand high energy efficiency [2][3][4][5][6][7][8][9][10], but it is a hard challenge for the OLED displays to meet the needs for high efficiency, color accuracy, and long lifetime simultaneously [2,[11][12][13][14][15]. Therefore, inorganic LED (ILED or µLED) display technology is under research and development by several companies worldwide [16][17][18][19][20][21][22][23][24][25][26][27][28].…”

19‐3: Lifetime Enhancement Toward Commercialization of Hyperfluorescence

“…Stable molecule and carrier balances in Emissive Layer (EML) are major approaches in order to enhance lifetime. Lifetime enhancement by charge balance using a co-host system in EML was reported [5]. This approach, however, needs four materials in EML, Host-1, Host-2, TADF and fluorescence.…”

Hyperfluorescence™: Excel the performance, create the future

“…Hyperfluorescence™ (HF), 4–10 the most advanced OLED emitting technology combining TADF molecule and fluorescence emitter, ultimately solves the remaining issues in OLED emitting technology. As illustrated in Figure 1, TADF molecule serving as an energy sensitizer can fully upconvert its triplet energy to singlet energy and subsequently transfer it to fluorescence emitter by effective Förster resonance energy transfer (FRET) mechanism.…”