KMS Chongqing Institute of Green and Intelligent Technology, CAS
| Copper thiocyanate/copper iodide based hole transport composites with balanced properties for efficient polymer light-emitting diodes | |
Luo, Wei1,2; Zeng, Chao1,2; Du, Xiaoqing1; Leng, Chongqian2; Yao, Wei2; Shi, Haofei2 ; Wei, Xingzhan2; Du, Chunlei2; Lu, Shirong2
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| 2018-05-14 | |
| 摘要 | The realization of hole transport materials (HTMs) with balanced properties is challenging. We address this challenge by merging inorganic copper thiocyanate (CuSCN) and copper iodide (CuI) into a composite, and balancing their hole-transport and surface-morphology properties through adjusting the CuI: CuSCN proportion. The advantages of both CuSCN and CuI are brought into play, including the controlled crystalline growth suppressed by the thiocyanate ion (SCN-) and the high mobility provided by CuI, thus yielding a cheap, stable, solution-and low-temperature processed HTM with a high transparency and mobility, suitable energy level and smooth surface morphology. The favourable balance is achieved at the CuI proportion of 25 wt%, which affords superior performances with maximum luminance and average current efficiency values of 147 000 cd m(-2) and 16.8 cd A(-1) for Super Yellow based polymer light-emitting diodes, 134% and 27% higher than that of a PEDOT: PSS based control device, respectively. Our results fulfill the expectation for a HTM with a good trade-off between interface characteristics and optoelectronic properties, providing a pathway for significant applications of inorganic HTMs in organic electronics, such as solar cells and thin-film transistors. |
| DOI | 10.1039/c7tc04842d |
| 发表期刊 | JOURNAL OF MATERIALS CHEMISTRY C
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| ISSN | 2050-7526 |
| 卷号 | 6期号:18页码:4895-4902 |
| 收录类别 | SCI |
| WOS记录号 | WOS:000433515700010 |
| 语种 | 英语 |
