Ultrafast Dynamics Investigation on Efficient NDT-based Small Molecule Heterojunctions （Invited）

Guangliu RAN; Liang ZHOU; Hao WU; Haijun FAN; Shumei SUN; Xiaozhang ZHU; Wenkai ZHANG

doi:10.3788/gzxb20215008.0850213

Journals >Acta Photonica Sinica >Volume 50 >Issue 8 >Page 0850213 > Article

Acta Photonica Sinica
Vol. 50, Issue 8, 0850213 (2021)

Ultrafast Dynamics Investigation on Efficient NDT-based Small Molecule Heterojunctions （Invited）

Guangliu RAN¹, Liang ZHOU¹, Hao WU², Haijun FAN², Shumei SUN^1、*, Xiaozhang ZHU^2、*, and Wenkai ZHANG¹

Author Affiliations

¹Department of Physics and Applied Optics Beijing Area Major Laboratory， Beijing Normal University， Beijing00875， China

²Beijing National Laboratory for Molecular Sciences， CAS Key Laboratory of Organic Solids， Institute of Chemistry， Chinese Academy of Sciences， Beijing100190， China

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DOI: 10.3788/gzxb20215008.0850213 Cite this Article

Guangliu RAN, Liang ZHOU, Hao WU, Haijun FAN, Shumei SUN, Xiaozhang ZHU, Wenkai ZHANG. Ultrafast Dynamics Investigation on Efficient NDT-based Small Molecule Heterojunctions （Invited）[J]. Acta Photonica Sinica, 2021, 50(8): 0850213 Copy Citation Text

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Fig. 1. Chemical structure of NDT and NDT-Hex small molecule donors

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Fig. 2. Normalized UV-Vis absorption spectra

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Fig. 3. TA measurement results of neat films

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Fig. 4. TA measurement results of blend films

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Fig. 5. The results of the global analysis based on the dynamics model for NDT：PC₇₁BM blend film

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	NDT：PC₇₁BM	NDT-Hex：PC₇₁BM	NDT-Hex：PC₇₁BM-SVA
$τ_{A} / p s$	1.9±0.4	1.7±0.3	1.7±0.3
$τ_{1} / p s$	22±7	20±6	20±6
$τ_{B} / p s$	68±33	70±37	70±37
$τ_{2} / p s$	1.4±0.2	2±0.5	0.40±0.03
$τ_{3} / p s$	5.9±1.0	5.8±2.0	3.5±0.6
$τ_{c} / p s$	157±60	280±180	134±48
CS yield	0.59±0.06	0.49±0.07	0.81±0.03

Table 1. Target fitting parameters and the corresponding CS efficiency obtained from the broadband transient absorption data of NDT-based blend films

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