Directly Unveiling the Energy Transfer Dynamics between Alq3 Molecules and Si by Ultrafast Optical Pump-Probe Spectroscopy

Yu Chan Tai; Wen Yen Tzeng; Jhen Dong Lin; Yi Hou Kuo; Fu Xiang Rikudo Chen; Ruei Jhe Tu; Ming Yang Huang; Shyh Shii Pai; Nick Weihan Chang; Sheng Yang Tseng; Chi Chen; Chun Liang Lin; Atsushi Yabushita; Shun Jen Cheng; Chih Wei Luo

doi:10.1021/acs.nanolett.3c03251

Directly Unveiling the Energy Transfer Dynamics between Alq₃ Molecules and Si by Ultrafast Optical Pump-Probe Spectroscopy

Yu Chan Tai, Wen Yen Tzeng, Jhen Dong Lin, Yi Hou Kuo, Fu Xiang Rikudo Chen, Ruei Jhe Tu, Ming Yang Huang, Shyh Shii Pai, Nick Weihan Chang, Sheng Yang Tseng, Chi Chen, Chun Liang Lin^*, Atsushi Yabushita, Shun Jen Cheng^*, Chih Wei Luo^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

The energy transfer (ET) between organic molecules and semiconductors is a crucial mechanism for enhancing the performance of semiconductor-based optoelectronic devices, but it remains undiscovered. Here, ultrafast optical pump-probe spectroscopy was utilized to directly reveal the ET between organic Alq₃ molecules and Si semiconductors. Ultrathin SiO₂ dielectric layers with a thickness of 3.2-10.8 nm were inserted between Alq₃ and Si to prevent charge transfer. By means of the ET from Alq₃ to Si, the SiO₂ thickness-dependent relaxation dynamics of photoexcited carriers in Si have been unambiguously observed on the transient reflectivity change (ΔR/R) spectra, especially for the relaxation process on a time scale of 200-350 ps. In addition, these findings also agree with the results of our calculation in a model of long-range dipole-dipole interactions, which provides critical information for developing future optoelectronic devices.

Original language	English
Pages (from-to)	10490-10497
Number of pages	8
Journal	Nano letters
Volume	23
Issue number	22
DOIs	https://doi.org/10.1021/acs.nanolett.3c03251
State	Published - 22 Nov 2023

Keywords

excitonic sensitization
nonradiative energy transfer
silicon
time-resolved spectroscopy

Access to Document

10.1021/acs.nanolett.3c03251

Cite this

Tai, Y. C., Tzeng, W. Y., Lin, J. D., Kuo, Y. H., Chen, F. X. R., Tu, R. J., Huang, M. Y., Pai, S. S., Chang, N. W., Tseng, S. Y., Chen, C., Lin, C. L., Yabushita, A., Cheng, S. J., & Luo, C. W. (2023). Directly Unveiling the Energy Transfer Dynamics between Alq₃ Molecules and Si by Ultrafast Optical Pump-Probe Spectroscopy. Nano letters, 23(22), 10490-10497. https://doi.org/10.1021/acs.nanolett.3c03251

@article{2f3aeaaf01814d7b9975b8f87e79a053,

title = "Directly Unveiling the Energy Transfer Dynamics between Alq3 Molecules and Si by Ultrafast Optical Pump-Probe Spectroscopy",

abstract = "The energy transfer (ET) between organic molecules and semiconductors is a crucial mechanism for enhancing the performance of semiconductor-based optoelectronic devices, but it remains undiscovered. Here, ultrafast optical pump-probe spectroscopy was utilized to directly reveal the ET between organic Alq3 molecules and Si semiconductors. Ultrathin SiO2 dielectric layers with a thickness of 3.2-10.8 nm were inserted between Alq3 and Si to prevent charge transfer. By means of the ET from Alq3 to Si, the SiO2 thickness-dependent relaxation dynamics of photoexcited carriers in Si have been unambiguously observed on the transient reflectivity change (ΔR/R) spectra, especially for the relaxation process on a time scale of 200-350 ps. In addition, these findings also agree with the results of our calculation in a model of long-range dipole-dipole interactions, which provides critical information for developing future optoelectronic devices.",

keywords = "excitonic sensitization, nonradiative energy transfer, silicon, time-resolved spectroscopy",

author = "Tai, {Yu Chan} and Tzeng, {Wen Yen} and Lin, {Jhen Dong} and Kuo, {Yi Hou} and Chen, {Fu Xiang Rikudo} and Tu, {Ruei Jhe} and Huang, {Ming Yang} and Pai, {Shyh Shii} and Chang, {Nick Weihan} and Tseng, {Sheng Yang} and Chi Chen and Lin, {Chun Liang} and Atsushi Yabushita and Cheng, {Shun Jen} and Luo, {Chih Wei}",

note = "Publisher Copyright: {\textcopyright} 2023 American Chemical Society.",

year = "2023",

month = nov,

day = "22",

doi = "10.1021/acs.nanolett.3c03251",

language = "English",

volume = "23",

pages = "10490--10497",

journal = "Nano letters",

issn = "1530-6984",

publisher = "American Chemical Society",

number = "22",

}

Tai, YC, Tzeng, WY, Lin, JD, Kuo, YH, Chen, FXR, Tu, RJ, Huang, MY, Pai, SS, Chang, NW, Tseng, SY, Chen, C, Lin, CL , Yabushita, A , Cheng, SJ & Luo, CW 2023, 'Directly Unveiling the Energy Transfer Dynamics between Alq₃ Molecules and Si by Ultrafast Optical Pump-Probe Spectroscopy', Nano letters, vol. 23, no. 22, pp. 10490-10497. https://doi.org/10.1021/acs.nanolett.3c03251

TY - JOUR

T1 - Directly Unveiling the Energy Transfer Dynamics between Alq3 Molecules and Si by Ultrafast Optical Pump-Probe Spectroscopy

AU - Tai, Yu Chan

AU - Tzeng, Wen Yen

AU - Lin, Jhen Dong

AU - Kuo, Yi Hou

AU - Chen, Fu Xiang Rikudo

AU - Tu, Ruei Jhe

AU - Huang, Ming Yang

AU - Pai, Shyh Shii

AU - Chang, Nick Weihan

AU - Tseng, Sheng Yang

AU - Chen, Chi

AU - Lin, Chun Liang

AU - Yabushita, Atsushi

AU - Cheng, Shun Jen

AU - Luo, Chih Wei

PY - 2023/11/22

Y1 - 2023/11/22

N2 - The energy transfer (ET) between organic molecules and semiconductors is a crucial mechanism for enhancing the performance of semiconductor-based optoelectronic devices, but it remains undiscovered. Here, ultrafast optical pump-probe spectroscopy was utilized to directly reveal the ET between organic Alq3 molecules and Si semiconductors. Ultrathin SiO2 dielectric layers with a thickness of 3.2-10.8 nm were inserted between Alq3 and Si to prevent charge transfer. By means of the ET from Alq3 to Si, the SiO2 thickness-dependent relaxation dynamics of photoexcited carriers in Si have been unambiguously observed on the transient reflectivity change (ΔR/R) spectra, especially for the relaxation process on a time scale of 200-350 ps. In addition, these findings also agree with the results of our calculation in a model of long-range dipole-dipole interactions, which provides critical information for developing future optoelectronic devices.

AB - The energy transfer (ET) between organic molecules and semiconductors is a crucial mechanism for enhancing the performance of semiconductor-based optoelectronic devices, but it remains undiscovered. Here, ultrafast optical pump-probe spectroscopy was utilized to directly reveal the ET between organic Alq3 molecules and Si semiconductors. Ultrathin SiO2 dielectric layers with a thickness of 3.2-10.8 nm were inserted between Alq3 and Si to prevent charge transfer. By means of the ET from Alq3 to Si, the SiO2 thickness-dependent relaxation dynamics of photoexcited carriers in Si have been unambiguously observed on the transient reflectivity change (ΔR/R) spectra, especially for the relaxation process on a time scale of 200-350 ps. In addition, these findings also agree with the results of our calculation in a model of long-range dipole-dipole interactions, which provides critical information for developing future optoelectronic devices.

KW - excitonic sensitization

KW - nonradiative energy transfer

KW - silicon

KW - time-resolved spectroscopy

UR - http://www.scopus.com/inward/record.url?scp=85178370908&partnerID=8YFLogxK

U2 - 10.1021/acs.nanolett.3c03251

DO - 10.1021/acs.nanolett.3c03251

M3 - Article

C2 - 37909686

AN - SCOPUS:85178370908

SN - 1530-6984

VL - 23

SP - 10490

EP - 10497

JO - Nano letters

JF - Nano letters

IS - 22

ER -

Directly Unveiling the Energy Transfer Dynamics between Alq₃ Molecules and Si by Ultrafast Optical Pump-Probe Spectroscopy

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this