On the interface reactions and stability of nonfullerene organic solar cells

Jiang, Pei; Hu, Lu; Sun, Lulu; Han, Hongwei; Li, Zhong’an; Zhou, Yinhua

doi:10.1039/d1sc07269b

Cited by 41 publications

(38 citation statements)

References 94 publications

(171 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since BHJ cohybrid morphology variation is the key to photovoltaic performance stability. As shown in Figure S10a, we investigated the results of photovoltaic performance tests with and without BTR-Cl for D18-Cl:N3 devices stored in an N2-filled glovebox under environmental conditions, and it can be seen that there is little difference in the performance of the two devices after 500 h of aging. , Whereas the device performance of the binary under one sunlight intensity irradiation condition drops sharply to 0.44 of the original value after 500 min (Figure S10b), the photostability of D18-Cl:N3 is significantly improved by adding only 20% of BTR-Cl. Figure S10c shows the stability of the device under heated 80 °C.…”

Section: Resultsmentioning

confidence: 99%

Efficient and Stable Ternary Organic Solar Cells Using Liquid Crystal Small Molecules with Multiple Synergies

Wen

Lin

et al. 2022

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

A liquid crystal small molecule donor BTR-Cl, which has strong self-assembly and crystallinity, is used as the third component to construct nonfullerenes ternary solar cells together with a broad-band donor polymer D18-Cl and a low-band acceptor N3. The introduction of BTR-Cl enhances the morphology, exciton dissociation, and charge mobility of the ternary blends, improves the short-circuit current density and fill factor, and results in an efficiency of up to 17.92%. Further results show that BTR-Cl acts as an energy level mediator, fluorescence resonance energy transfer and charge transfer intermediary, and morphology modifier in ternary blends. They work synergistically in ternary blends to optimize the electrical and morphological properties, resulting in enhanced photovoltaic performance and improved stability and detection performance. It brings vitality to the field of organic solar cells (OSCs) and organic photodetectors (OPDs) research.

show abstract

Section: Resultsmentioning

confidence: 99%

Efficient and Stable Ternary Organic Solar Cells Using Liquid Crystal Small Molecules with Multiple Synergies

Wen

Lin

et al. 2022

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

“…Especially, ultraviolet (UV) photos under 400 nm are the most energetic part of sunlight irradiation but have less contribution to the energy conversion process in OSCs, which will cause the decomposition of the reactive double-bond linker between the donor and acceptor moieties in nonfullerene acceptors and accelerate the degradation of OSCs. [16][17][18][19][20] In addition to applying photostable materials to construct photoactive layers, various strategies have been performed to improve UV-light stability. Hybrid nanostructured flexible transparent electrodes can be served as a built-in UV filter to inhibit the inevitable degradation caused by UV irradiation.…”

mentioning

confidence: 99%

Self‐Assembly Metal Chelate as Ultraviolet Filterable Interface Layer for Efficient Organic Solar Cells

Shi

Líu

et al. 2022

Advanced Energy Materials

View full text Add to dashboard Cite

Interface engineering plays a vital role in the further improvement of efficiency and stability for organic solar cells (OSCs). Herein, a self‐assembly metal chelate based on hafnium and a designed ligand, N‐(4‐(3‐oxobutanoyl)phenyl)acetamide (ACBN) is applied as both interfacial modification layer and UV‐light filter in OSCs. The strong hydrogen‐bond induced intermolecular interaction enables Hf(ACBN)4 with the prerequisite of adequate solvent resistance to work as an electron transport layer (ETL) in the inverted OSCs. The self‐assembly behavior of Hf(ACBN)4 on the SnO2 film surface via constructing compact coordination structure has been verified via systematic theory calculations. In addition to optimizing the energy level alignment, the Hf(ACBN)4 modification effectively passivates the surface defect of SnO2 films for less surface charge recombination and a more efficient charge collection process. Thus, the OSCs with Hf(ACBN)4 layer yield a maximum PCE of 18.1%, better than that based on the bare SnO2 layer. Moreover, beneficial from the reduced oxygen vacancies via coordination effect and the UV‐light filter function of Hf(ACBN)4, the OSCs based on SnO2/ Hf(ACBN)4 composite ETL exhibit preferable stabilities under UV‐light irradiation or continuous operational conditions.

show abstract

“…Roll-to-roll (R2R) coating of organic photovoltaic (OPV) devices in air necessitates the use of green solvents and considerations of interactions between different layers, including chemistries and solubility. − To date, several high-performance photoactive materials and hole-transporting interlayers have been successfully coated using scalable techniques for efficient large-area OPVs. , In contrast, few electron transporting interlayers have been demonstrated for large-area OPVs using R2R approaches in conventional architectures . These layers, in addition to facilitating electron transfer from the photoactive layer to the top electrode, must also have the following properties: (1) processable from polar solvents to avoid solubilizing the underlying photoactive layer (i.e., the coating solvent is immiscible with the photoactive materials), (2) processable from nontoxic solvents to ensure the minimal negative impact on human beings during the OPV manufacturing process and on the environment during solvent waste disposal, and (3) processable into uniform large-area films with electrical performance independent of dry thickness …”

Section: Introductionmentioning

confidence: 99%

New Perylene Diimide Ink for Interlayer Formation in Air-Processed Conventional Organic Photovoltaic Devices

Farahat

Anderson

Martell

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Roll-to-roll coating of conventional organic photovoltaic architectures in air necessitates low work function, electron-harvesting interlayers as the top interface, termed cathode interlayers. Traditional materials based on metal oxides are often not compatible with coating in air and/or green solvents, require thermal annealing, and are limited in feasibility due to interactions with underlying layers. Alternatively, perylene diimide materials offer easily tunable redox properties, are amenable to air coating in green solvents, and are considered champion organic-based cathode interlayers. However, underlying mechanisms of the extraction of photogenerated electrons are less well understood. Herein, we demonstrate the utilization of two N-annulated perylene diimide materials, namely, PDIN-H and CN-PDIN-H, in air-processed conventional organic photovoltaic devices, using the now standard PM6:Y6 photoactive layer. The processing ink formulation using cesium carbonate as a processing agent to solubilize the perylene diimides in suitable green solvents (1-propanol and ethyl acetate) for uniform film formation using spin or slot-die coating on top of the photoactive layer is critical. Cesium carbonate remains in the film, creating hybrid organic/metal salt cathode interlayers. Best organic photovoltaic devices have power conversion efficiencies of 13.2% with a spin-coated interlayer and 13.1% with a slot-die-coated interlayer, superior to control devices using the classic conjugated polyelectrolyte PFN-Br as an interlayer (ca. 12.8%). The cathode interlayers were found to be semi-insulating in nature, and the device performance improvements were attributed to beneficial interfacial effects and electron tunneling through sufficiently thin layers. The efficiencies beyond 13% achieved in air-processed organic photovoltaic devices utilizing slot-die-coated cathode interlayers are among the highest reported so far, opening new opportunities for the fabrication of large-area solar cell modules.

show abstract

On the interface reactions and stability of nonfullerene organic solar cells

Abstract: Long-term stability is critical for organic solar cells (OSCs) to enter practical applications. Several factors affect the stability of the OSCs, including the materials stability, morphology stability of bulk-heterojunction and...

Cited by 41 publications

References 94 publications

Efficient and Stable Ternary Organic Solar Cells Using Liquid Crystal Small Molecules with Multiple Synergies

Efficient and Stable Ternary Organic Solar Cells Using Liquid Crystal Small Molecules with Multiple Synergies

Self‐Assembly Metal Chelate as Ultraviolet Filterable Interface Layer for Efficient Organic Solar Cells

New Perylene Diimide Ink for Interlayer Formation in Air-Processed Conventional Organic Photovoltaic Devices

Contact Info

Product

Resources

About