Spectroelectrochemical evidence for the effect of phase structure and interface on charge behavior in poly(3-hexylthiophene): Fullerene active layer

Hu, Rong; Ni, Haitao; Wang, Zhaodong; Liu, Yurong; Liu, Hongdong; Yang, Xin; Cheng, Jiang

doi:10.1016/j.chemphys.2016.07.017

Cited by 5 publications

(4 citation statements)

References 37 publications

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“…The steady-state absorption spectra of PTB7 is changed to that of PTB7 •+ when it loses an electron under the condition of electric field. The main absorption bands are consisted of 800–1400 nm and beyond 1400 nm, which are similar with the absorption characteristic of P3HT •+ [ 27 ]. Here, we also identify the former as P2 transition absorption band, whereas the latter is referred as P1 absorption band.…”

Section: Resultsmentioning

confidence: 89%

Appropriate Donor-Acceptor Phase Separation Structure for the Enhancement of Charge Generation and Transport in Polymer Solar Cells

Zhang

Cheng

et al. 2018

Polymers

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The morphology of active layer for polymer solar cells is critical to enhance the performance especially for fill factor of the devices. To investigate the relationship between active layer morphology and performance of polymer solar cells (PSCs), 1,8-diiodooctane (DIO) additive, and [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) electron acceptor were used to regulate the aggregation morphology of copolymer poly(thieno[3,4-b]-thiophene/benzodithiophene) (PTB7) electron donor from solution state to solid state. Atom force microscopy (AFM), steady-state absorption (UV-Vis), time-resolved absorption (TA), spectroelectrochemistry (SEC) and current-voltage (J-V) measurements were employed to characterize the morphology, optical and electrical characteristics of active layers and to reveal the relationship among the morphology, photophysical property, and performance of PTB7-based devices. The results show that DIO can refine the aggregation scale of PTB7 during the dissolution process, whereas both the aggregation scale and aggregation behaviors of PTB7 donor are affected by PC71BM acceptor molecules. Furthermore, the bulk heterojunction structure (BHJ) morphology of active layer can be optimized during the DIO evaporation process. TA kinetic data indicate that the population and lifetime of charged species are improved in the DIO-treated BHJ active layer. Moreover, the active layers with DIO treatment have a relative low highest occupied molecular orbital (HOMO) energy level, which makes hole transport more easily in PTB7 donor phase. As a result, the performance of PTB7-based PSCs is enhanced.

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Section: Resultsmentioning

confidence: 89%

Appropriate Donor-Acceptor Phase Separation Structure for the Enhancement of Charge Generation and Transport in Polymer Solar Cells

Zhang

Cheng

et al. 2018

Polymers

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“…The spectroelectrochemistry measurement of photovoltaic materials was followed with our previous literature. 42,43 The oxidation potential for the PM6 film was 0.8−1 V, whereas the reduction potential of the PY-IT film was set at −0.8 V.…”

Section: Methodsmentioning

confidence: 99%

“…The X-ray photoelectron spectroscopy (XPS) measurement of the MoO 3 film was tested using a scientific research service platform (Ceshigo Research Service, Chengdu). The spectroelectrochemistry measurement of photovoltaic materials was followed with our previous literature. , The oxidation potential for the PM6 film was 0.8–1 V, whereas the reduction potential of the PY-IT film was set at −0.8 V.…”

Section: Methodsmentioning

confidence: 99%

Photoelectric Conversion and Device Stability of PM6:PY-IT Solar Cells Based on a Water Solution-Processed MoO₃ Hole Transport Layer

Xiao

Liu

et al. 2023

ACS Appl. Mater. Interfaces

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To enhance the power conversion efficiency (PCE) and stability of all-polymer solar cells (all-PSCs), a new precursor solution based on an in situ chemical reaction of nanomolybdenum powder (Mo), hydrogen peroxide (H2O2), and ammonia (NH3·H2O) was developed for preparing a MoO3 hole transport layer (HTL) for all-PSCs. The results showed that the PCE and stability of PM6:PY-IT solar cells based on the MoO3 HTL were better than those based on a PEDOT:PSS layer. To further understand the relationship between the HTL and the device performance, ultrafast photophysical processes of all-PSCs based on different HTLs were contrastively analyzed. Our research indicated that the micromorphology of active layers could be influenced by the interfacial layer material, consequently determining the photoelectric conversion process of all-PSCs. The MoO3-based all-PSCs had longer charge lifetime, higher charge mobility, and lower charge recombination characteristics compared with the devices based on the PEDOT:PSS layer during the operation time. As a result, the MoO3-based PM6:PY-IT solar cells achieved an initial PCE of 15.2%, and they still maintained more than 80% of their initial efficiency after 1000 h.

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“…The authors elucidated how blending the P3HT polymer with phenyl C-61 butyric acid methyl ester (PCBM) affected polaron formation in the polymer, by comparing well-mixed (as-cast) and phase-separated (thermally annealed) blends. The correlation between morphology of active layer and performance of polymer solar cells was investigated in [ 106 ] by spectroelectrochemical characterization of P3HT, PCBM cation and anion in varied active layers. Revealing the influence of polymer phase structures and the polymer-fullerene interface on the absorption spectra of the polarons was useful for understanding charge generation and transfer in polymer solar cell.…”

Section: Spectroelectrochemical Approach To Study Electroactive Compo...mentioning

confidence: 99%

Spectroelectrochemistry of Electroactive Polymer Composite Materials

Грибкова

Некрасов

2022

Polymers

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In this review, we have summarized the main advantages of the method of spectroelectrochemistry as applied to recent studies on electrosynthesis and redox processes of electroactive polymer composite materials, which have found wide application in designing organic optoelectronic devices, batteries and sensors. These polymer composites include electroactive polymer complexes with large unmovable dopant anions such as polymer electrolytes, organic dyes, cyclodextrins, poly(β-hydroxyethers), as well as polymer-inorganic nanocomposites. The spectroelectrochemical methods reviewed include in situ electron absorption, Raman, infrared and electron spin resonance spectroscopies.

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Spectroelectrochemical evidence for the effect of phase structure and interface on charge behavior in poly(3-hexylthiophene): Fullerene active layer

Cited by 5 publications

References 37 publications

Appropriate Donor-Acceptor Phase Separation Structure for the Enhancement of Charge Generation and Transport in Polymer Solar Cells

Appropriate Donor-Acceptor Phase Separation Structure for the Enhancement of Charge Generation and Transport in Polymer Solar Cells

Photoelectric Conversion and Device Stability of PM6:PY-IT Solar Cells Based on a Water Solution-Processed MoO₃ Hole Transport Layer

Spectroelectrochemistry of Electroactive Polymer Composite Materials

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Spectroelectrochemical evidence for the effect of phase structure and interface on charge behavior in poly(3-hexylthiophene): Fullerene active layer

Cited by 5 publications

References 37 publications

Appropriate Donor-Acceptor Phase Separation Structure for the Enhancement of Charge Generation and Transport in Polymer Solar Cells

Appropriate Donor-Acceptor Phase Separation Structure for the Enhancement of Charge Generation and Transport in Polymer Solar Cells

Photoelectric Conversion and Device Stability of PM6:PY-IT Solar Cells Based on a Water Solution-Processed MoO3 Hole Transport Layer

Spectroelectrochemistry of Electroactive Polymer Composite Materials

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Photoelectric Conversion and Device Stability of PM6:PY-IT Solar Cells Based on a Water Solution-Processed MoO₃ Hole Transport Layer