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Passivation of Metal Oxide Surfaces for High-Performance Organic and Hybrid Optoelectronic Devices
Chemistry of Materials ( IF 7.2 ) Pub Date : 2015-03-18 00:00:00 , DOI: 10.1021/acs.chemmater.5b00129
Shuyi Liu 1 , Szuheng Ho 1 , Ying Chen 1 , Franky So 1
Chemistry of Materials ( IF 7.2 ) Pub Date : 2015-03-18 00:00:00 , DOI: 10.1021/acs.chemmater.5b00129
Shuyi Liu 1 , Szuheng Ho 1 , Ying Chen 1 , Franky So 1
Affiliation
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The exciton quenching properties of solution-processed nickel oxide (NiOx) and vanadium oxide (VOx) are studied by measuring the photoluminescence (PL) of a thin emitting layer (EML) deposited on top of the metal oxides. Strong exciton quenching is evidenced at the metal oxide/EML interface, which is proved to be detrimental to the performance of optoelectronic devices. With a thin polyvinylpyrrolidone (PVP) passivation polymer adsorbed on top of metal oxides, the PL quenching is found to be effectively suppressed. A short UV–O3 treatment on top of the PVP-passivated metal oxides turns out to be a key procedure to trigger the chemical binding between the PVP passivation polymer and the metal oxide surface species, which turns out to be necessary for efficient hole injection and extraction for organic light emitting diodes (OLEDs) and solar cell devices, respectively. With the PVP passivation layer followed by UV–O3 treatment, the OLEDs incorporating NiOx as a hole transport layer (HTL) shows a record current efficiency of 90.8 ± 2.1 Cd A–1 with significantly suppressed efficiency roll-off, the OLEDs incorporating VOx as a hole injection layer (HIL) also shows higher current efficiencies at higher luminescence. Both perovskite solar cells and polymer solar cells incorporating NiOx HTLs show a 60% enhancement in power conversion efficiency (PCE) with PVP passivation polymer.
中文翻译:
高性能有机和混合光电器件的金属氧化物表面钝化
通过测量沉积在金属氧化物顶部的薄发光层(EML)的光致发光(PL),研究了固溶处理的氧化镍(NiO x)和氧化钒(VO x)的激子猝灭性能。在金属氧化物/ EML界面处证实了强激子猝灭,这被证明对光电器件的性能有害。通过将薄的聚乙烯吡咯烷酮(PVP)钝化聚合物吸附在金属氧化物的顶部,可以有效抑制PL猝灭。短紫外线–O 3在PVP钝化的金属氧化物上进行表面处理是触发PVP钝化聚合物和金属氧化物表面物质之间化学键合的关键过程,这对于有效的空穴注入和有机发光提取是必不可少的二极管(OLED)和太阳能电池设备。在PVP钝化层之后进行UV–O 3处理后,采用NiO x作为空穴传输层(HTL)的OLED的电流效率达到了创纪录的90.8±2.1 Cd A –1,并且效率滚降明显受到抑制, VO x因为空穴注入层(HIL)在更高的发光度下也显示出更高的电流效率。钙钛矿太阳能电池和结合了NiO x HTL的聚合物太阳能电池都显示出PVP钝化聚合物的功率转换效率(PCE)提高了60%。
更新日期:2015-03-18
中文翻译:

高性能有机和混合光电器件的金属氧化物表面钝化
通过测量沉积在金属氧化物顶部的薄发光层(EML)的光致发光(PL),研究了固溶处理的氧化镍(NiO x)和氧化钒(VO x)的激子猝灭性能。在金属氧化物/ EML界面处证实了强激子猝灭,这被证明对光电器件的性能有害。通过将薄的聚乙烯吡咯烷酮(PVP)钝化聚合物吸附在金属氧化物的顶部,可以有效抑制PL猝灭。短紫外线–O 3在PVP钝化的金属氧化物上进行表面处理是触发PVP钝化聚合物和金属氧化物表面物质之间化学键合的关键过程,这对于有效的空穴注入和有机发光提取是必不可少的二极管(OLED)和太阳能电池设备。在PVP钝化层之后进行UV–O 3处理后,采用NiO x作为空穴传输层(HTL)的OLED的电流效率达到了创纪录的90.8±2.1 Cd A –1,并且效率滚降明显受到抑制, VO x因为空穴注入层(HIL)在更高的发光度下也显示出更高的电流效率。钙钛矿太阳能电池和结合了NiO x HTL的聚合物太阳能电池都显示出PVP钝化聚合物的功率转换效率(PCE)提高了60%。