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Enhanced Efficiency of Tandem Organic Light-Emitting Diodes via Manipulating Heterojunction Composition of Charge Generation Unit
Physica Status Solidi (A) - Applications and Materials Science Pub Date : 2021-06-30 , DOI: 10.1002/pssa.202100188 Zhaoyue Lü 1 , Lijiang Zhang 1 , Junling Wang 2 , Jing Xiao 3
Physica Status Solidi (A) - Applications and Materials Science Pub Date : 2021-06-30 , DOI: 10.1002/pssa.202100188 Zhaoyue Lü 1 , Lijiang Zhang 1 , Junling Wang 2 , Jing Xiao 3
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Tandem organic light-emitting diodes (OLEDs) with an organic photovoltaic heterojunction (OPV-HJ) as a charge generation unit (CGU), consisting of fullerence (C60) and copper phthalocyanine (CuPc), are fabricated. The device structures are ITO/EL unit/C60–CuPc HJ/MoO3/EL unit/Al, where EL unit is composed of NPB/Alq3/LiF. The efficiency improvement of tandem OLEDs is achieved by manipulating the structure and composition of C60–CuPc HJs. The charge generation and transport characteristics of CGUs are strongly dependent on the detailed structures of C60–CuPc HJs and the optimized CGU is 0.5:1 C60:CuPc bulk-HJ. The improved efficiency of the tandem device with 0.5:1 C60:CuPc bulk-HJ as CGU demonstrates to be the result of better charge carrier balance induced by the optimal charge transport and charge generation of C60:CuPc bulk-HJs according to their surface morphology and absorption spectra. These results shed light on that C60:CuPc OPV-HJ-based CGU is a promising connection unit for the fabrication of high-efficiency tandem OLEDs.
中文翻译：
通过操纵电荷产生单元的异质结组成提高串联有机发光二极管的效率
制造了具有有机光伏异质结 (OPV-HJ) 作为电荷生成单元 (CGU) 的串联有机发光二极管 (OLED)，由富勒 (C 60 ) 和铜酞菁 (CuPc) 组成。器件结构为ITO/EL单元/C 60 –CuPc HJ/MoO 3 /EL单元/Al，其中EL单元由NPB/Alq 3 /LiF组成。通过操纵 C 60 –CuPc HJ的结构和组成，可以提高串联 OLED 的效率。CGUs 的电荷产生和传输特性强烈依赖于 C 60 –CuPc HJs的详细结构，优化的 CGU 为 0.5:1 C 60:CuPc 块状 HJ。串联装置的改进的效率有0.5：1C 60：的CuPc散装-HJ作为CGU演示是由C的最佳电荷传输和电荷产生感应更好的电荷载流子平衡的结果60：的CuPc批量HJS根据它们的表面形貌和吸收光谱。这些结果表明，基于 C 60 :CuPc OPV-HJ 的 CGU 是用于制造高效串联 OLED 的有前途的连接单元。
更新日期：2021-06-30
中文翻译：
通过操纵电荷产生单元的异质结组成提高串联有机发光二极管的效率
制造了具有有机光伏异质结 (OPV-HJ) 作为电荷生成单元 (CGU) 的串联有机发光二极管 (OLED)，由富勒 (C 60 ) 和铜酞菁 (CuPc) 组成。器件结构为ITO/EL单元/C 60 –CuPc HJ/MoO 3 /EL单元/Al，其中EL单元由NPB/Alq 3 /LiF组成。通过操纵 C 60 –CuPc HJ的结构和组成，可以提高串联 OLED 的效率。CGUs 的电荷产生和传输特性强烈依赖于 C 60 –CuPc HJs的详细结构，优化的 CGU 为 0.5:1 C 60:CuPc 块状 HJ。串联装置的改进的效率有0.5：1C 60：的CuPc散装-HJ作为CGU演示是由C的最佳电荷传输和电荷产生感应更好的电荷载流子平衡的结果60：的CuPc批量HJS根据它们的表面形貌和吸收光谱。这些结果表明，基于 C 60 :CuPc OPV-HJ 的 CGU 是用于制造高效串联 OLED 的有前途的连接单元。
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