Self-assembly monolayers manipulate the power conversion processes in organic photovoltaics

Hu, Ting; Lv, Xiaolan; Cheng, Xiaofang; Huang, Liqiang; Zhang, Lifu; Zhou, Weihua; Jiang, Ping; Hu, Lin; Zhou, Yinhua; Chen, Lie

doi:10.1016/j.jpowsour.2018.10.091

Cited by 9 publications

(5 citation statements)

References 49 publications

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“…The conductivity of the pristine ZnO, ODT-treated ZnO (ODT@ZnO), and OTMS-treated ZnO (OTMS@ZnO) ETL films were found to be 5.25 × 10 –5 , 1.0 × 10 –4 , and 1.14 × 10 –4 S/cm, respectively. The strong affinity of –SH and –Si(OCH 3 ) 3 anchoring on the ZnO surface enables more effective passivation of the hydroxyl and oxygen adsorbants, resulting in a 2-fold increase in conductivity of ZnO after SAM modification. , The slightly improved conductivity of the silane-anchored SAM could be attributed to the synergistic impact of the higher electronegativity of oxygen compared to sulfur and the SAM’s effective passivation, as seen by its larger water contact angle (Figure b). The increased conductivity of SAM-based devices will improve J sc and FF, resulting in a higher PCE.…”

Section: Resultsmentioning

confidence: 99%

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Self-Assembled Monolayer Engineered ZnO Electron Transport Layer to Improve the Photostability of Organic Solar Cells

Gebremariam,

Hone,

Negash

et al. 2024

Energy Fuels

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The degradation of organic solar cells (OSCs) can occur in any of the layers, underlining the importance of each layer in prolonging their lifetime. To enhance the performance and stability of inverted OSCs (i-OSCs), interfacial modification has been employed. In this context, two self-assembled monolayers (SAMs), namely, octadecanthiol (ODT) and octadecyltrimethoxysilane (OTMS), were utilized to effectively passivate typical surface defects in the ZnO electron transport layer (ETL). The SAM-treated ZnO films were found to be more hydrophobic, which reduced surface defects produced by adsorbed oxygen and hydroxyl groups. Consequently, the power conversion efficiency (PCE) of the i-OSCs comprising an indacenodithieno[3,2-b]thiophene-alt-5,5-di(thiophen-2-yl)-2,2-bithiazole (PIDTT-DTBTz) donor blended with [6,6]-phenyl-C 71 -butyric acid methyl ester (PC 70 BM) acceptor increased from 4.20% in pristine ZnO-to 5.01 and 5.37% in ODTand OTMS-treated ZnO-based devices, respectively. In addition, the photostability of the device substantially improved. Hence, devices based on ZnO treated with ODT and OTMS kept 76 and 89% of their initial PCE, respectively, while pristine ZnO-based devices retained only 66% of the initial PCE after 48 h of irradiation. The improved PCE and extended lifetime of the i-OSCs can be attributed to enhanced charge transfer, the reduction in both bimolecular and trap-assisted recombination processes, and the enhanced interface between the ETL and the active layer. Moreover, it has been observed that the OTMS-treated ZnO ETL-based i-OSC offers better stability and more efficient devices compared to the ODT-treated ZnO ETL-based devices. This can be attributed to the favorable dipole moment generated by the increased electrostatic potential at the anchor group, which promotes improved device performance.

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Section: Resultsmentioning

confidence: 99%

“…In turn, this creates good energy-level alignment, accounting for the minor increase in V oc observed in the OTMS-modified device. 33 The improved FF is attributed to the lower series resistance 24 in the devices after the ODT and OTMS modifications of ZnO ETL, as shown in Table 1.…”

Section: ■ Introductionmentioning

confidence: 97%

Self-Assembled Monolayer Engineered ZnO Electron Transport Layer to Improve the Photostability of Organic Solar Cells

Gebremariam,

Hone,

Negash

et al. 2024

Energy Fuels

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“…Optimize and enhance the integration system of sports and health industries: Research affirms the positive impact of integrating sports and health industries on the advanced structuring of the sports industry [ 16 , 17 ]. This supports enterprises in swiftly identifying related industrial elements and ensures the smooth entry of these elements into the corresponding industrial chain, facilitating the dynamic integration of the value chains of both major industries.…”

Section: Discussionmentioning

confidence: 99%

Can the integration of sports and health industries drive the upgrade of the sports industry?—An empirical study based on Chinese-style modernization

Liu,

Lin,

Dong

2024

PLoS ONE

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Background In the course of China’s modernization, the sports industry’s advancement plays a dual role in enhancing national health and driving economic transformation. The integration and coalescence of the sports and health sectors have emerged as pivotal avenues for the structural elevation of China’s sports industry. Hence, empirically scrutinizing the influential mechanisms and outcomes of sports and health industry integration on the sports industry’s structural enhancement holds substantial practical significance. Method This study formulates theoretical hypotheses regarding the impact mechanism of sports and health industry integration on the sports industry’s sophisticated industrial structure. Drawing insights from literature review and categorization, three dimensions—industrial integration, government role, and market mechanism—are delineated. Employing panel data spanning 2015 to 2020 from four primary Chinese cities, an econometric model is devised to empirically dissect the influence of sports and health industry integration on the sports industry’s structural advancement. Findings The three pivotal explanatory variables—integration of sports and health industries, government role, and market mechanism—exert a positive influence on the sports industry’s sophisticated industrial structure. Notably, the impact of market mechanisms outweighs that of government roles, with government roles exhibiting comparatively weaker individual impact effects. Conclusion The dynamic development process characterizing the structural advancement of China’s sports industry in first-tier cities exhibits positive and sustained developmental traits, with discernible convergence in trends. While market mechanisms demonstrate a more immediate and pronounced direct promotional effect than government roles, the enduring influence of government roles over an extended timeframe is evident from a dynamic long-term development perspective. Building upon these findings, the study suggests relevant stakeholders foster advanced sports industry structures by: refining the integration system of sports and health industries; fortifying the fundamental role of market mechanisms; and fully leveraging the government’s impact in promoting sports and health industry integration.

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“…Chen et al used methoxyphenylphosphonic acid (MPPA) to reduce surface defect and WF of ZnO. The exciton generation, diffusion, dissociation, and charge transport with reduced bimolecular recombination and trap‐based recombination loss were promoted, leading to a high PCE of 11% based on fullerene‐free (poly[(2,6‐(4,8‐bis(5‐(2‐ethylhexyl)thiophen)‐2‐yl)benzo[1,2‐b:4,5‐b']dithiophene)‐co‐(1,3‐di(5‐thiophene‐2‐yl)‐5,7‐bis(2‐ethylhexyl)‐benzo[1,2‐c:4,5‐c']dithiophene‐4,8‐dione)] (PBDB‐T): 3,9‐bis(2‐methylene‐(3‐[1,1‐dicyanomethylene]‐indanone)‐5,5,11,11‐tetrakis(4‐hexylphenyl)‐dithieno[2,3‐d:2′,3′‐d']‐s‐indaceno[1,2‐b:5,6‐b']‐dithiophene (ITIC)) PSCs 87 . Li et al developed a series of small molecule SAMs with different WFs to optimize the energetic and interfacial properties of active layer/ZnO heterointerface based on polymer/nonfullerene PSCs (Figure 6B).…”

Section: Modification Of Interface Layers By Sams For Pscsmentioning

confidence: 99%

Self‐assembled monolayers for interface engineering in polymer solar cells

Yang³

et al. 2022

Journal of Polymer Science

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Polymer solar cell (PSC) has been developed vastly in the past decade due to the advantages of low cost, lightweight, mechanical flexibility, versatility of chemical design and synthesis, semitransparency, and solution processing. The performance and lifetime of PSCs are highly dependent on the properties of both active materials and their interfaces. The combination of the versatility of organic chemistry and the multitude of well-understood ligand-metal interactions allows self-assembled monolayers (SAMs) of organic molecules to direct control over the electronic and chemical properties at the inorganic-organic interfaces. Thus, SAMs are an attractive pathway to reconcile interfaces with tunable interface properties in PSCs. Hence, this review describes the application of SAMs in PSCs at different interfaces. First, SAMs as alternatives of traditional transporting materials to reduce the barrier at indium tin oxide (ITO)/ active layer interface due to the ability of tuning work function of ITO electrode are discussed. Second, the modifications of metal oxide by SAMs to control the electrical contacts at transporting layer/active layer interface are described. Third, tailoring the properties of the donor/acceptor interface by SAMs to improve the performance of PSCs are summarized. Finally, perspectives and challenges are pointed out for developing highly stable and highperformance PSCs by applying SAMs.

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Self-assembly monolayers manipulate the power conversion processes in organic photovoltaics

Cited by 9 publications

References 49 publications

Self-Assembled Monolayer Engineered ZnO Electron Transport Layer to Improve the Photostability of Organic Solar Cells

Self-Assembled Monolayer Engineered ZnO Electron Transport Layer to Improve the Photostability of Organic Solar Cells

Can the integration of sports and health industries drive the upgrade of the sports industry?—An empirical study based on Chinese-style modernization

Self‐assembled monolayers for interface engineering in polymer solar cells

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