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Jin S, Tian Y, Liu F, et al. Exploring the Intrinsic Piezofluorochromic Mechanism of TPE-An by STS Technique. Nanoscale Res Lett. 2015;10(1):1036doi: 10.1186/s11671-015-1036-7.
Jin, S., Tian, Y., Liu, F., Deng, S., Chen, J., & Xu, N. (2015). Exploring the Intrinsic Piezofluorochromic Mechanism of TPE-An by STS Technique. Nanoscale research letters, 10(1), 1036. https://doi.org/10.1186/s11671-015-1036-7
Jin, Shunyu, et al. "Exploring the Intrinsic Piezofluorochromic Mechanism of TPE-An by STS Technique." Nanoscale research letters vol. 10,1 (2015): 1036. doi: https://doi.org/10.1186/s11671-015-1036-7
Jin S, Tian Y, Liu F, Deng S, Chen J, Xu N. Exploring the Intrinsic Piezofluorochromic Mechanism of TPE-An by STS Technique. Nanoscale Res Lett. 2015 Dec;10(1):1036. doi: 10.1186/s11671-015-1036-7. Epub 2015 Sep 03. PMID: 26334542; PMCID: PMC4558996.
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Nanoscale Res Lett. 2015 Dec;10(1):1036. doi: 10.1186/s11671-015-1036-7. Epub 2015 Sep 03.

Exploring the Intrinsic Piezofluorochromic Mechanism of TPE-An by STS Technique.

Nanoscale research letters

Shunyu Jin, Yan Tian, Fei Liu, Shaozhi Deng, Jun Chen, Ningsheng Xu

Affiliations

  1. State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, Sun Yat-sen University, Guangzhou, 510275, People's Republic of China.

PMID: 26334542 PMCID: PMC4558996 DOI: 10.1186/s11671-015-1036-7

Abstract

9,10-bis(4-(1,2,2-triphenylvinyl)styryl)anthracene (TPE-An) materials have attracted considerable attention in recent years because they have high luminescence efficiency and excellent piezofluorochromic properties, which have potential applications in organic light-emitting display (OLED) area. Scanning tunneling spectroscopy (STS) technique was used to study the piezofluorochromic mechanism of aggregation-induced emission (AIE) materials for the first time. Photoluminescence (PL) experiments revealed that the emission peak of TPE-An is observed to exhibit a red-shift with the increase of the grinding time. A theoretical calculation was carried out to find the relationship between the bandgap of TPE-An and the external force by combination of the classical tunneling theory and STS results. It is found that when the pressure variation on the surface of TPE-An film was increased to be over 4.38 × 10(4) Pa, the shrink of the highest occupied molecular orbital (HOMO)-lowest unoccupied molecular orbital (LUMO) gap can arrive at 1.1 eV. It is concluded that the piezofluorochromic behaviors of TPE-An should originate from the shrinking effect of the bandgap under external force. Moreover, this research method may shed light on comprehending and adjusting the piezofluorochromic characters of other AIE materials.

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