Transient absorption (TA) spectroscopy is considered as a powerful technique that reflects the ultrafast dynamics of photogenerated carriers in photoelectric and photocatalysis materials. However, limited by its sensitivity, the photogenerated carrier density in TA measurements of solar energy materials is usually much higher than that in the real working condition. Here, we present a combination of kHz macro-pulse and MHz micro-pulse technique for an ultrahigh sensitive TA spectrometer, which improves the sensitivity to the 10−7 level of OD. It enables us to study ultrafast carrier dynamics pumped by very low power, which can avoid the influence of many-body interactions and the nonlinear effect associated with high carrier density. This work provides a novel TA method with ultrahigh sensitivity, which will play an important role in investigating the carrier dynamics of semiconductors in the working condition.
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May 2021
Research Article|
May 06 2021
Ultrahigh sensitive transient absorption spectrometer
Huang Li
;
Huang Li
1
Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemical Physics, University of Science and Technology of China
, Hefei 230026, China
2
State Key Laboratory of Molecular Reaction Dynamics and Dynamics Research Center for Energy and Environmental Materials, Dalian Institute of Chemical Physics, Chinese Academy of Sciences
, Dalian 116023, China
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Gang Hu;
Gang Hu
3
Institute of Solar Energy Materials and Devices, College of Materials Science and Engineering, Sichuan University
, No. 24 South Section 1, Yihuan Road, Chengdu 610065, China
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Bo-Han Li;
Bo-Han Li
a)
2
State Key Laboratory of Molecular Reaction Dynamics and Dynamics Research Center for Energy and Environmental Materials, Dalian Institute of Chemical Physics, Chinese Academy of Sciences
, Dalian 116023, China
4
University of Chinese Academy of Science
, 19 A Yuquan Road, Beijing 100049, People’s Republic of China
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Wen Zeng;
Wen Zeng
2
State Key Laboratory of Molecular Reaction Dynamics and Dynamics Research Center for Energy and Environmental Materials, Dalian Institute of Chemical Physics, Chinese Academy of Sciences
, Dalian 116023, China
4
University of Chinese Academy of Science
, 19 A Yuquan Road, Beijing 100049, People’s Republic of China
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Jingquan Zhang;
Jingquan Zhang
3
Institute of Solar Energy Materials and Devices, College of Materials Science and Engineering, Sichuan University
, No. 24 South Section 1, Yihuan Road, Chengdu 610065, China
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Xingan Wang
;
Xingan Wang
1
Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemical Physics, University of Science and Technology of China
, Hefei 230026, China
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Chuanyao Zhou;
Chuanyao Zhou
2
State Key Laboratory of Molecular Reaction Dynamics and Dynamics Research Center for Energy and Environmental Materials, Dalian Institute of Chemical Physics, Chinese Academy of Sciences
, Dalian 116023, China
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Zefeng Ren
;
Zefeng Ren
a)
2
State Key Laboratory of Molecular Reaction Dynamics and Dynamics Research Center for Energy and Environmental Materials, Dalian Institute of Chemical Physics, Chinese Academy of Sciences
, Dalian 116023, China
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Xueming Yang
Xueming Yang
2
State Key Laboratory of Molecular Reaction Dynamics and Dynamics Research Center for Energy and Environmental Materials, Dalian Institute of Chemical Physics, Chinese Academy of Sciences
, Dalian 116023, China
5
Department of Chemistry, Southern University of Science and Technology
, 1088 Xueyuan Road, Shenzhen, Guangdong 518055, China
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Rev. Sci. Instrum. 92, 053002 (2021)
Article history
Received:
February 19 2021
Accepted:
April 16 2021
Citation
Huang Li, Gang Hu, Bo-Han Li, Wen Zeng, Jingquan Zhang, Xingan Wang, Chuanyao Zhou, Zefeng Ren, Xueming Yang; Ultrahigh sensitive transient absorption spectrometer. Rev. Sci. Instrum. 1 May 2021; 92 (5): 053002. https://doi.org/10.1063/5.0048115
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