Improved inverted-organic-solar-cell performance via sulfur doping of ZnO films as electron buffer layer

Zafar, Muhammad; Yun, Ju‐Young; Kim, Do‐Heyoung

doi:10.1016/j.mssp.2019.01.046

Cited by 13 publications

(2 citation statements)

References 37 publications

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“…For the preparation of ZnO thin film, an optimum study for the best molar solution of ZAD was performed by using three different molar solutions 1 M, 0.5 M, and 0.1 M of ZAD in ethanol, and it was found that the 0.5-M solution was the best choice based on the obtained results as 0.1-M solution required a higher number of spin coating cycles to obtain the desired thickness while achieving a thin-film with the 1-M solution was not possible due to its high density. After UV-ozone cleaning of IDE’s, a 0.5-M solution of ZAD and MEA in ethanol was spin coated on the substrate in two steps (500 rpm for 30 s and 1500 rpm for 15 s) followed by sintering at 150 °C for 20 min and the same process was repeated seven times to obtain a uniform thin film followed by annealing for one hour [ 46 , 47 ]. A solution of GrF in MEK solvent was spray coated on the already spin-coated thin film of ZnO followed by heating the sample at 150 °C for 1 h on a hotplate.…”

Section: Methodsmentioning

confidence: 99%

High-Performance Humidity Sensor Based on the Graphene Flower/Zinc Oxide Composite

et al. 2021

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Performance of an electronic device relies heavily on the availability of a suitable functional material. One of the simple, easy, and cost-effective ways to obtain novel functional materials with improved properties for desired applications is to make composites of selected materials. In this work, a novel composite of transparent n-type zinc oxide (ZnO) with a wide bandgap and a unique structure of graphene in the form of a graphene flower (GrF) is synthesized and used as the functional layer of a humidity sensor. The (GrF/ZnO) composite was synthesized by a simple sol–gel method. Morphological, elemental, and structural characterizations of GrF/ZnO composite were performed by a field emission scanning electron microscope (FESEM), energy-dispersive spectroscopy (EDS), and an x-ray diffractometer (XRD), respectively, to fully understand the properties of this newly synthesized functional material. The proposed humidity sensor was tested in the relative humidity (RH) range of 15% RH% to 86% RH%. The demonstrated sensor illustrated a highly sensitive response to humidity with an average current change of 7.77 μA/RH%. Other prominent characteristics shown by this device include but were not limited to high stability, repeatable results, fast response, and quick recovery time. The proposed humidity sensor was highly sensitive to human breathing, thus making it a promising candidate for various applications related to health monitoring.

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Section: Methodsmentioning

confidence: 99%

High-Performance Humidity Sensor Based on the Graphene Flower/Zinc Oxide Composite

et al. 2021

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“…Recent advances towards improvement of the power conversion efficiency (PCE) of organic solar cells (OSC) have shown that the photovoltaic parameters depend mainly on the morphology of the active layer [1][2][3] , the interfacial layers (electron and hole transporter layer) [4][5][6][7] and the architecture of devices 8,9 .…”

Section: Introductionmentioning

confidence: 99%

Flexible, Large-Area Organic Solar Cells With Improved Performance Through Incorporation of CoFe2O4 Nanoparticles in the Active Layer

Pereira

Lima²,

Almeida

et al. 2019

Mat. Res.

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Cobalt ferrite (CoFe 2 O 4) nanoparticles (NPs), with an average diameter of about 4-10 nm, were produced by the proteic sol-gel method and successfully doped into the active layer of poly(3-hexylthiophene-2,5diyl) (P3HT):[6,6]-phenyl-C61-butyric acid methyl ester (PCBM) organic solar cells. Pristine and CoFe 2 O 4 NPs-doped blends of P3HT:PCBM were dispersed in a mixture of o-xylene:tetralin (1 mg/mL) based non-halogenated solvents and deposited via a semi-industrial blade coating process on flexible substrates to fabricate large area (0.55 cm 2), flexible organic solar cells with inverted configuration. The main focus of this study aims to assess the influence of NPs on the efficiency, stability and lifetime of the produced devices. From the photovoltaic parameters it was observed that the optimization of the bulk-heterojunction through the incorporation of CoFe 2 O 4 NPs resulted in increased short-circuit current density. As a result, the power conversion efficiency of doped devices increased by 10 % when compared with the undoped reference devices. Tests of lifetime and stability were performed using International Summit on OPV Stability (ISOS) protocols ISOS-D-3, ISOS-O-1 and ISOS-L-1. For the duration of the tests (1200 h), the results showed that doped cells presented performances at least comparable with those of reference cells.

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Solution‐Processable Zinc Oxide for Printed Photovoltaics: Progress, Challenges, and Prospect

Han

Guo

Luo

et al. 2023

Adv Energy and Sustain Res

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Zinc oxide (ZnO) is a promising candidate as the electron‐transporting layer of roll‐to‐roll printed organic and perovskite solar cells (OSCs and PVSCs) because it is low cost, nontoxic, earth‐abundant, and has multiple solution‐processable routes comparable. It has been widely used in both OSCs and PVSCs for many years. With the long‐time development of the ZnO buffer layer, various synthesis, fabrication, and modification approaches have been developed. Meanwhile, several issues including light‐soaking issues, defects issues, and agglomeration issues have emerged and have been solved. In this review, the synthesis approaches of solution‐processed zinc oxide, the application in the OSCs and the PVSCs, and the typical challenges of the solution‐processed ZnO for use in the OSCs and PVSCs have been summarized. Finally, an outlook on the development of solution‐processed ZnO for the upscaling of OSCs and PVSCs is given.

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Improved inverted-organic-solar-cell performance via sulfur doping of ZnO films as electron buffer layer

Cited by 13 publications

References 37 publications

High-Performance Humidity Sensor Based on the Graphene Flower/Zinc Oxide Composite

High-Performance Humidity Sensor Based on the Graphene Flower/Zinc Oxide Composite

Flexible, Large-Area Organic Solar Cells With Improved Performance Through Incorporation of CoFe2O4 Nanoparticles in the Active Layer

Solution‐Processable Zinc Oxide for Printed Photovoltaics: Progress, Challenges, and Prospect

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