Amine‐Functionalized Carbon Dots as PEDOT:PSS Dopants for Organic Solar Cells

Li, Xin; Wang, Wei; Zhong, Wentao; Tang, Yirong; Wang, Xinyuan; Li, Huan; Yang, Tingbin; Liang, Yongye

doi:10.1002/admi.202300502

Adv Materials Inter

2023

DOI: 10.1002/admi.202300502

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Amine‐Functionalized Carbon Dots as PEDOT:PSS Dopants for Organic Solar Cells

Xin Li,

Wei Wang,

Wentao Zhong

et al.

Abstract: The hole transport layer (HTL) is an important component in organic solar cells (OSCs). As a commonly used HTL, poly(3,4‐ethylenedioxythiophene):poly(styrene‐sulfonate) (PEDOT:PSS) in OSCs generally exhibits relatively low conductivity, hindering device performance improvement. Herein, amine‐functionalized carbon dots (CDs‐N) are introduced as dopants of PEDOT:PSS, which can effectively enhance the HTL conductivity while maintaining a similar work function. The PEDOT:PSS+CDs‐N devices exhibit higher power conv… Show more

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Cited by 4 publications

References 33 publications

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Dynamically Favorable Ion Channels Enabled by a Hybrid Ionic‐Electronic Conducting Film toward Highly Reversible Zinc Metal Anodes

Li,

Wei

et al. 2024

Advanced Materials

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Aqueous zinc ion batteries show great promise for future applications due to their high safety and ecofriendliness. However, nonuniform dendrite growth and parasitic reactions on the Zn anode have severely impeded their use. Herein, a hybrid ionic‐electronic conducting ink composed of graphene‐like carbon nitride (g‐C3N4) and conductive polymers (CP) of poly(3,4ethylenedioxythiophene)‐poly(styrenesulfonate) (PEDOT:PSS) is introduced to Zn anode using a scalable spray‐coating strategy. Notably, the g‐C3N4 promotes a screening effect, disrupting the coulombic interaction between the PEDOT+ segments and PSS− chains within CP, thereby reducing interfacial resistance and homogenizing the surface electric field distribution of the Zn anode. Furthermore, the abundant N‐containing species and ─SO3− groups in g‐C3N4/CP exhibit strong zincophilicity, which accelerates the diffusion of Zn2+ and disrupts the solvation structure of Zn(H2O)62+, thus improving the Zn2+ transfer capability. Consequently, the g‐C3N4/CP can powerfully stabilize the Zn2+ flux and thus enable a high coulombic efficiency of 99.47% for 1500 cycles and smooth Zn plating/stripping behaviors more than 3000 h at a typical current density of 1 mA cm−2. These findings shed new light on the Zn electrodeposition process under the mediation of g‐C3N4/CP and offer sustainability considerations in designing more stable Zn‐metal anodes with enhanced reversibility.

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Dynamically Favorable Ion Channels Enabled by a Hybrid Ionic‐Electronic Conducting Film toward Highly Reversible Zinc Metal Anodes

Li,

Wei

et al. 2024

Advanced Materials

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Fine‐Tuning Conformation of PEDOT Chains Enables Simultaneously Enhanced Conductivity, Work Function, Transmittance, and Waterproofness in PEDOT:PSS Interlayer for Highly Efficient and Stable Organic Photovoltaics

Zhang,

Dong,

Xie

et al. 2024

Small

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Poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is widely utilized as the hole transport layer (HTL) inorganic photovoltaics (OPVs) because of its low‐temperature solution processing peculiarity, high optical transmittance, and excellent mechanical flexibility. However, the core–shell structure of PSS coated PEDOT results in relatively low conductivity, work function, transmittance and waterproofness of PEDOT:PSS interlayer, limiting the photovoltaic performance and stability of OPVs. Here, the conformation of PEDOT chains are regulated from helical benzoyl to linear quinone structure via incorporation of 2D Cd0.85PS3Li0.15H0.15dopant into the conventional PEDOT:PSS interlayer, promoting an interpenetrating network structure in PEDOT:PSS interlayer and forming an efficient hole transport channel from active layer to ITO electrode. Such features significantly improve the electrical conductivity, work function, and transmittance of PEDOT:PSS interlayer. In consequence, the maximum power conversion efficiency (PCE) of D18:L8‐BO, PBDB‐T:ITIC, as well as PTzBI‐dF:L8‐BO based OPVs ameliorated from 18.37%, 8.94%, and 15.80% to 19.26%, 10.00%, and 16.83%, respectively. The application of Cd0.85PS3Li0.15H0.15 doping PEDOT:PSS strategy demonstrates great potential for the development of strongly conductive, large‐work‐function, highly transparent, and excellent‐waterproof PEDOT:PSS interlayer toward highly efficient and stable OPVs.

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A Partial Metal Coordination Strategy toward High‐Performance and Cost‐Effective Electron Transporting Layer for Organic Solar Cells

Yu,

Huang,

et al. 2024

Solar RRL

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Additives are frequently employed in the active layer of organic solar cells (OSCs) to fine‐tune morphology and improve overall device performance. The use of additive in electron transporting layer (ETL) has garnered less attention. In this study, we develop poly(2‐vinyl pyridine) (P2VP) based cost‐effective ETLs for OSCs. Addition of CoCl2 to the P2VP affords ETLs with enhanced conductivity and optimized work function. OSCs employing this ETL demonstrate prolonged carrier lifetime, suppressed charge recombination, and achieve higher power conversion efficiencies (PCEc) than the commonly used ETLs such as PFNBr and Phen‐NaDPO. The cost of the P2VP‐Co is merely one‐twentieth of that associated with Phen‐NaDPO or PFNBr. Mechanism studies and density functional theory (DFT) calculations reveal that the partial metal salt coordination of P2VP leaves free pyridine rings for dipole interactions with the Ag electrode, and provides higher electrostatic potentials and larger dipole moments compared to the polymer alone, thereby increasing conductivity. The polymer and metal salt additive strategy demonstrates its effectiveness in boosting device performance, offering valuable possibility for designing novel electronic materials and expanding the applications of widely available polymers.This article is protected by copyright. All rights reserved.

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Amine‐Functionalized Carbon Dots as PEDOT:PSS Dopants for Organic Solar Cells

Cited by 4 publications

References 33 publications

Dynamically Favorable Ion Channels Enabled by a Hybrid Ionic‐Electronic Conducting Film toward Highly Reversible Zinc Metal Anodes

Dynamically Favorable Ion Channels Enabled by a Hybrid Ionic‐Electronic Conducting Film toward Highly Reversible Zinc Metal Anodes

Fine‐Tuning Conformation of PEDOT Chains Enables Simultaneously Enhanced Conductivity, Work Function, Transmittance, and Waterproofness in PEDOT:PSS Interlayer for Highly Efficient and Stable Organic Photovoltaics

A Partial Metal Coordination Strategy toward High‐Performance and Cost‐Effective Electron Transporting Layer for Organic Solar Cells

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