Finely Tuned Polymer Interlayers Enhance Solar Cell Efficiency

Liu, Yao; Page, Zachariah A.; Russell, Thomas P.; Emrick, Todd

doi:10.1002/ange.201503933

Cited by 24 publications

(20 citation statements)

References 31 publications

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“…(1) 调节电极的功函数. 阴极修饰层的引入能够降低阴极材料的功函数 [33] , 调节电极与活性层之间的能量势垒, 使得活性层与电极间形成欧姆接触 [34] , 从而降低器件的串联电阻, 提高阴极对电子的抽取效率.…”

Section: 阴极修饰层的功能unclassified

Recent advances on aromatic-diimide based cathode interfacial materials for polymer solar cells

Zou¹,

Zhang²,

Huang³

et al. 2020

Sci. Sin.-Chim

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As an emerging photovoltaic technology, polymer solar cells (PSCs) have attracted broad interest for both academic and industry communities due to their outstanding advantages, such as lightweight, low cost and easy to process in large areas. In recent years, the power conversion efficiency of PSCs has been improved rapidly, exceeding 17% for the state-of-the-art devices. For device optimization, it has been demonstrated that the efficiency and stability can be significantly improved by constructing efficient organic cathode interfacial materials. Specially, aromatic-diimide based cathode interfacial materials have attracted much attention due to their advantages of excellent electron transport, easily chemical modification and suitable energy levels. In this review, along with the briefly introduction on the basic functions of cathode interlayer, recent progress of cathode interlayer based on perylene diimides and naphthalene diimides was summarized. At last, the perspective and challenge were proposed according to the requirements of practical application.

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Section: 阴极修饰层的功能unclassified

Recent advances on aromatic-diimide based cathode interfacial materials for polymer solar cells

Zou¹,

Zhang²,

Huang³

et al. 2020

Sci. Sin.-Chim

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“…Most of the CPEs developed so far are effective in reducing the electrode work function [ 11 , 12 , 13 ] and might behave as electron transport layers [ 14 , 15 ]. Therefore there is a huge library of CPEs in the literature that have been investigated as cathode interfacial layers to facilitate the electron collection at the cathode in OSCs [ 16 , 17 , 18 , 19 , 20 , 21 ]. There is, however, also a growing number of CPEs that have been reported to behave as promising anode interfacial layers to facilitate hole extraction at the ITO electrode [ 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

Sulfonate-Conjugated Polyelectrolytes as Anode Interfacial Layers in Inverted Organic Solar Cells

et al. 2021

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Conjugated polymers with ionic pendant groups (CPEs) are receiving increasing attention as solution-processed interfacial materials for organic solar cells (OSCs). Various anionic CPEs have been successfully used, on top of ITO (Indium Tin Oxide) electrodes, as solution-processed anode interlayers (AILs) for conventional devices with direct geometry. However, the development of CPE AILs for OSC devices with inverted geometry is an important topic that still needs to be addressed. Here, we have designed three anionic CPEs bearing alkyl-potassium-sulfonate side chains. Their functional behavior as anode interlayers has been investigated in P3HT:PC61BM (poly(3-hexylthiophene): [6,6]-phenyl C61 butyric acid methyl ester) devices with an inverted geometry, using a hole collecting silver electrode evaporated on top. Our results reveal that to obtain effective anode modification, the CPEs’ conjugated backbone has to be tailored to grant self-doping and to have a good energy-level match with the photoactive layer. Furthermore, the sulfonate moieties not only ensure the solubility in polar orthogonal solvents, induce self-doping via a right choice of the conjugated backbone, but also play a role in the gaining of hole selectivity of the top silver electrode.

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“…13−16 Perylene diimide (PDI) molecules and polymers represent an important class of organic interlayer modifying materials. 17,18 The PDI chromophore can be easily functionalized with polar or ionic side chains to allow water/alcohol processing, and tailoring of the cathode interlayer work function. 19,20 PDI derivatives, such as phosphate groupcontaining PDI derivative (PDIP), 21 PDIs with amino (PDIN) or amino N-oxide (PDINO) imide side-chains, 18 polymeric PDIs with amino imide side-chains (PF-PDIN), 20 and PDIs functionalized with ionic and methacrylate groups (PDIM) 22 are all effective cathode surface modifiers for OPVs.…”

Section: ■ Introductionmentioning

confidence: 99%

Interfacial ZnO Modification Using a Carboxylic Acid Functionalized N-Annulated Perylene Diimide for Inverted Type Organic Photovoltaics

Abd-Ellah

Cann

Dayneko

et al. 2019

ACS Appl. Electron. Mater.

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This study reports the modification of the zinc oxide cathodic interlayer with an N-annulated perylene diimide molecule functionalized with a carboxylic acid, namely, (HOOC 5 -triazole) PDIN-hex, referred to as IL-1, for the improvement of inverted-type organic photovoltaics. The new interlayer "IL-1" was synthesized using "click" chemistry and incorporated into the photovoltaic device structure using solution processing methods. The organic modified zinc oxide layer was characterized using optical absorption spectroscopy, contact angle measurements, and Kelvin probe force microscopy. IL-1 was retained on the zinc oxide surface and lowered the electrode work function from 4.5 to 4.1 eV, the low work function is crucial for any cathodic interlayer to match with the LUMO energy levels of acceptor materials for better charge extraction and electron collection properties. Bulk heterojunction organic photovoltaic devices utilizing this interlayer (compared to only zinc oxide) exhibited increases in power conversion efficiency ranging from 20% to 33% for those with active layer blends based on both fullerene and non-fullerene acceptors.

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Finely Tuned Polymer Interlayers Enhance Solar Cell Efficiency

Cited by 24 publications

References 31 publications

Recent advances on aromatic-diimide based cathode interfacial materials for polymer solar cells

Recent advances on aromatic-diimide based cathode interfacial materials for polymer solar cells

Sulfonate-Conjugated Polyelectrolytes as Anode Interfacial Layers in Inverted Organic Solar Cells

Interfacial ZnO Modification Using a Carboxylic Acid Functionalized N-Annulated Perylene Diimide for Inverted Type Organic Photovoltaics

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