[1] H Sasabe, J Kido. Development of high performance OLEDs for general lighting. Journal of Materials Chemistry C, 1, 1699-1707(2013).

[2] J J Li, X M Nie, G S Li, et al. Comparison and research progress of flat panel display technology. Chinese Optics, 11, 695-710(2018).

[3] Y Huang, E L Hsiang, M Y Deng, et al. Mini-LED, Micro-LED and OLED displays: present status and future perspectives. Light: Science & Applications, 9, 105(2020).

[4] M A Baldo, D F O'brien, Y You, et al. Highly efficient phosphorescent emission from organic electroluminescent devices. Nature, 395, 151-154(1998).

[5] Y Liu, C Li, Z Ren, et al. All-organic thermally activated delayed fluorescence materials for organic light-emitting diodes. Nature Reviews Materials, 3, 1-20(2018).

[6] H Uoyama, K Goushi, K Shizu, et al. Highly efficient organic light-emitting diodes from delayed fluorescence. Nature, 492, 234-238(2012).

[7] P Wei, D Zhang, M Cai, et al. Simplified single-emitting-layer hybrid white organic light-emitting diodes with high efficiency, low efficiency roll-off, high color rendering index and superior color stability. Organic Electronics, 49, 242-248(2017).

[8] Y Liu, F Liang, L S Cui, et al. Simplified hybrid white organic light-emitting diodes with a mixed fluorescent blue emitting layer for exciton managing and lifetime improving. Advanced Optical Materials, 4, 2051-2056(2016).

[9] H Liu, Y Fu, B Z Tang, et al. All-fluorescence white organic light-emitting diodes with record-beating power efficiencies over 130 lm·W^‒1 and small roll-offs. Nature Communications, 13, 5154(2022).

[10] F Zhao, Z Zhang, Y Liu, et al. A hybrid white organic light-emitting diode with stable color and reduced efficiency roll-off by using a bipolar charge carrier switch. Organic Electronics, 13, 1049-1055(2012).

[11] Y Sun, N C Giebink, H Kanno, et al. Management of singlet and triplet excitons for efficient white organic light-emitting devices. Nature, 440, 908-912(2006).

[12] S Ying, W Liu, L Peng, et al. A promising multifunctional deep-blue fluorophor for high-performance monochromatic and hybrid white OLEDs with superior efficiency/color stability and low efficiency Roll-off. Advanced Optical Materials, 10, 2101920(2022).

[13] M Sarma, K T Wong. Exciplex: an intermolecular charge-transfer approach for TADF. ACS Applied Materials & Interfaces, 10, 19279-19304(2018).

[14] Q Zhang, B Li, S Huang, et al. Efficient blue organic light-emitting diodes employing thermally activated delayed fluorescence. Nature Photonics, 8, 326-332(2014).

[15] C Zhao, T Zhang, J Chen, et al. High-performance hybrid white organic light-emitting diodes with simple emitting structures and low efficiency roll-off based on blue thermally activated delayed fluorescence emitters with bipolar transport characteristics. Journal of Materials Chemistry C, 6, 9510-9516(2018).

[16] S Y Byeon, K H Lee, J Y Lee. Benzonitrile and dicyanocarbazole derived electron transport type host materials for improved device lifetime in blue thermally activated delayed fluorescent organic light-emitting diodes. Journal of Materials Chemistry C, 8, 5832-5838(2020).

[17] Y L Zhang, Q Ran, Q Wang, et al. High-efficiency red organic light-emitting diodes with external quantum efficiency close to 30% based on a novel thermally activated delayed fluorescence emitter. Advanced Materials, 31, 1902368(2019).

[18] Q Zhang, D Tsang, H Kuwabara, et al. Nearly 100% internal quantum efficiency in undoped electroluminescent devices employing pure organic emitters. Advanced Materials, 27, 2096-2100(2015).

[19] N Li, F Ni, X Lv, et al. Host-dopant interaction between organic thermally activated delayed fluorescence emitter and host material: Insight into the excited state. Advanced Optical Materials, 10, 2101343(2022).

[20] Y Chen, J Zhu, Y Wu, et al. Highly efficient fluorescence/phosphorescence hybrid white organic light-emitting devices based on a bipolar blue emitter to precisely control charges and excitons. Journal of Materials Chemistry C, 8, 7543-7551(2020).

[21] J H Jou, C Y Hsieh, J R Tseng, et al. Candle light-style organic light-emitting diodes. Advanced Functional Materials, 23, 2750-2757(2013).

[22] M Gao, P L Burn, A Pivrikas. Balanced hole and electron transport in Ir (ppy) 3: TCTA blends. ACS Photonics, 8, 2425-2430(2021).

[23] N C Erickson, R J Holmes. Investigating the role of emissive layer architecture on the exciton recombination zone in organic light-emitting devices. Advanced Functional Materials, 23, 5190-5198(2013).

[24] X Tang, Y Li, Y K Qu, et al. All-fluorescence white organic light-emitting diodes exceeding 20% EQEs by rational manipulation of singlet and triplet excitons. Advanced Functional Materials, 30, 1910633(2020).

[25] Z Wang, R X Wu, Y Feng, et al. High-efficiency blue phosphorescent OLEDs based on mixed-host structure by solution-processed method. Chinese Journal of Luminescence, 43, 763-772(2022).

[26] Q S Tian, S Yuan, W S Shen, et al. Multichannel effect of triplet excitons for highly efficient green and red phosphorescent OLEDs. Advanced Optical Materials, 8, 2000556(2020).

[27] M Hasan, A Shukla, V Ahmad, et al. Exciton-exciton annihilation in thermally activated delayed fluorescence emitter. Advanced Functional Materials, 30, 2000580(2020).

[28] C Yin, Y Zhang, T Huang, et al. Highly efficient and nearly roll-off-free electrofluorescent devices via multiple sensitizations. Science Advances, 8, eabp9203(2022).

[29] L S Cui, A J Gillett, S F Zhang, et al. Fast spin-flip enables efficient and stable organic electroluminescence from charge-transfer states. Nature Photonics, 14, 636-642(2020).

[30] G W Kim, H W Bae, R Lampande, et al. Highly efficient single-stack hybrid cool white OLED utilizing blue thermally activated delayed fluorescent and yellow phosphorescent emitters. Scientific Reports, 8, 16263(2018).