Interface engineering through electron transport layer modification for high efficiency organic solar cells

Borse, Kunal; Sharma, Ramakant; Gupta, Dipti; Yella, Aswani

doi:10.1039/c7ra13428b

Cited by 25 publications

(16 citation statements)

References 54 publications

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“…In addition, modification of ZnO with pyridine‐based small molecules also showed smooth surface morphology and higher hydrophobicity than that of ZnO, which is beneficial for better interfacial contact with the active layer. Borse et al 212 used ZnO/Ba (OH) 2 as CIL in inverted OSCs and demonstrated enhanced performance than neat ZnO‐based interlayer. It was observed that the bilayer CIL had a low work function and relatively smooth surface morphology as compared to pristine ZnO.…”

Section: Cathode Interlayer Materialsmentioning

confidence: 99%

Recent progress in cathode interlayer materials for non‐fullerene organic solar cells

Ahmad

Zhou

Fan

et al. 2021

EcoMat

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Non‐fullerene acceptors are currently a hot research area in the development of organic solar cells (OSCs). At present, the‐state‐of‐the‐art power conversion efficiency (PCE) of non‐fullerene organic solar cells (NF‐OSCs) with single and multiple‐junction has surpassed 18% and 19%, respectively. The cathode interlayer (CIL) plays a significant role in the improvement of PCE and the stability of OSCs. Recently, a large number of CIL materials have been employed in OSCs. This review summarizes the recent progress of CIL materials and systematically describes their impact on the device efficiency and stability in single‐junction NF‐OSCs. Firstly, the functions, key requirements, and distinctive features of CILs when used in NF‐OSCs are summarized. Afterward, some big families of materials including metal oxides, metal salts/complexes, small molecules, polymers, composites/hybrids are presented as CIL for NF‐OSCs. Finally, the scale‐up techniques, conclusion, and future challenges regarding CIL in NF‐OSCs are elucidated.

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Section: Cathode Interlayer Materialsmentioning

confidence: 99%

Recent progress in cathode interlayer materials for non‐fullerene organic solar cells

Ahmad

Zhou

Fan

et al. 2021

EcoMat

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“…6. shows the Nyquist plot of the devices with and without Cd-doped buffer layer, which was measured in dark condition, 5% CZO ETL significantly lower than other devices, indicating more efficient electron extraction and reducing interfacial charge recombination at interface [38][39][40][41][42].…”

Section: Resultsmentioning

confidence: 95%

Solution-processible Cd-doped ZnO nanoparticles as an electron transport layer to achieve high performance polymer solar cells through improve conductivity and light transmittance

Ren

Qing

et al. 2019

Preprint

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In this work, electron transport layers (ETLs)with high charge transfer ability was fabricated by doping ZnO nanoparticles with different concentrations of cadmium. The performance for an inverted polymer solar cell based on PTB7-Th: PC71BM with 5% cadmium doping of zinc oxide nanoparticles (CZO) ETL is better than pure ZnO,which can enhance the short-circuit current (J SC), from 16.30 mA/cm2 to 17.15 mA/cm2, the fill factor (FF) from 64.45% to 69.38%, power conversion efficiency（PCE）from 8.09% to 9.28%. It's consequence of performance stems from curbing interfacial charge recombination and effective charge extraction. Meanwhile, Taking a series of characterization methods, such as atomic force microscopy (AFM), the space charge limited current (SCLC), transmittance, the charge dissociation probabilities (P(E,T)), photo-electrochemical impedance spectroscopy (EIS). The results indicate that the electrical conductivity and transmittance of the films are improved by incorporation of Cd in the ZnO film, restrained surface charge recombination and enhanced the electron-transport capability. Therefore, the ETL of Cd-doped will be an ideal candidate for future optoelectronic devices.

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“…Therefore, the implementation of ZnO/TiO 2 bilayer as ETM for Sb 2 S 3 solar cells has a beneficial influence on the interface properties and indirectly validates the energy band as sketched in Figure 2c, where the conduction band edges are reported to be −4.3 eV (ZnO), −4.2 eV (TiO 2 ), and −3.7 eV Sb 2 S 3 . [ 5,35 ]…”

Section: Resultsmentioning

confidence: 99%

Functional ZnO/TiO₂ Bilayer as Electron Transport Material for Solution‐Processed Sb₂S₃ Solar Cells

et al. 2021

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Electron transport materials (ETMs) are considered a keystone component of third‐generation solar cells. Among the alternative ETM, metal oxide bilayers have attracted increasing attention due to their easy processing and tunability of cascade energy alignment. Herein, a metal oxide bilayer that combines ZnO and TiO2 compact films (ZnO/TiO2) is implemented as ETM for solution‐processed Sb2S3 planar solar cells. The bilayer ETM achieves the highest photovoltaic performance when compared with devices based on single ETM. Thus, the optimized device based on ZnO/TiO2 ETM yields a champion efficiency of 5.08% with an open‐circuit voltage of 0.58 V and a current density of 16.17 mA cm−2. Using surface photovoltage, electrochemical impedance spectroscopy, and current density–voltage analyses, it is demonstrated that the use of ZnO/TiO2 promotes charge injection, decreases series resistance and shutting paths, and leads to the reduction of charge recombination at the ETM/Sb2S3 interface.

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Interface engineering through electron transport layer modification for high efficiency organic solar cells

Abstract: Schematic of PTB7-Th:PCBM OSCs in an inverted geometry with ZnO, ZnO/Ba(OH)2 and ZnO:Ba(OH)2 nanocomposites as ETLs.

Cited by 25 publications

References 54 publications

Recent progress in cathode interlayer materials for non‐fullerene organic solar cells

Recent progress in cathode interlayer materials for non‐fullerene organic solar cells

Solution-processible Cd-doped ZnO nanoparticles as an electron transport layer to achieve high performance polymer solar cells through improve conductivity and light transmittance

Functional ZnO/TiO₂ Bilayer as Electron Transport Material for Solution‐Processed Sb₂S₃ Solar Cells

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Interface engineering through electron transport layer modification for high efficiency organic solar cells

Abstract: Schematic of PTB7-Th:PCBM OSCs in an inverted geometry with ZnO, ZnO/Ba(OH)2 and ZnO:Ba(OH)2 nanocomposites as ETLs.

Cited by 25 publications

References 54 publications

Recent progress in cathode interlayer materials for non‐fullerene organic solar cells

Recent progress in cathode interlayer materials for non‐fullerene organic solar cells

Solution-processible Cd-doped ZnO nanoparticles as an electron transport layer to achieve high performance polymer solar cells through improve conductivity and light transmittance

Functional ZnO/TiO2 Bilayer as Electron Transport Material for Solution‐Processed Sb2S3 Solar Cells

Contact Info

Product

Resources

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Functional ZnO/TiO₂ Bilayer as Electron Transport Material for Solution‐Processed Sb₂S₃ Solar Cells