Aqueous Solution-Deposited Molybdenum Oxide Films as an Anode Interfacial Layer for Organic Solar Cells

Yi, Qinghua; Zhai, Pengfei; Sun, Yinghui; Lou, Yanhui; Zhao, Jie; Sun, Baoquan; Luo, Hongmei; Zhang, Wenrui; Liang, Jenn‐Tai; Wang, Haiyan

doi:10.1021/am506367g

Cited by 27 publications

(19 citation statements)

References 52 publications

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“…By following this simple procedure many different compounds have been grown: single [68][69][70][71][72][73][74][75][76][77][78][79][80][81] and multicationic oxides [38][39][40]60,[82][83][84][85][86][87][88][89][90][91][92] , nitrides 35,36,[93][94][95][96][97] , carbides [98][99][100] and pure element semiconductors, like Germanium 101 . Multicationic oxides are probably the more interesting category due to their large variety of compositions, crystal structures and functionalities.…”

Section: Preparation Of Stable Solutions For Polymer Assisted Deposition Of Thin-filmsmentioning

confidence: 99%

Polymer assisted deposition of epitaxial oxide thin films

et al. 2018

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Section: Preparation Of Stable Solutions For Polymer Assisted Deposition Of Thin-filmsmentioning

confidence: 99%

Polymer assisted deposition of epitaxial oxide thin films

et al. 2018

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“…A comparison was made by Yi et al between a PAD solution processed MoO x thin film to both evaporated MoO x and PEDOT:PSS. The UV‐vis transparency of the different materials shows that the solution processed MoO x has the highest transmission in the Vis‐NIR range, and the highest photocurrent density of the three types of material they investigated . This improvement in the PAD deposited MoO x thin film compared to the evaporated thin film is attributed to the higher transparency at full surface coverage.…”

Section: Thin Film Applications and Devicesmentioning

confidence: 92%

Section: Thin Film Applications and Devicesmentioning

confidence: 99%

Solution Processable Metal Oxide Thin Film Deposition and Material Growth for Electronic and Photonic Devices

Glynn

O’Dwyer

2016

Adv Materials Inter

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A comprehensive review of recent advances in solution processing and growth of metal‐oxide thin films for electronic and photonic devices is presented, with specific focus on precise solution‐based technological coatings for electronics and optics, and new concepts for oxide material growth for electrochemical, catalytic, energy storage and conversion systems, information technology, semiconductor device processing and related devices. Throughout, the nature of the soluble precursors solutions and their relationship to film formation process by various solution coating techniques are collated and compared, highlighting advantages in precursor design for creating complex oxides for devices. Because of the versatility of solution‐processable oxides and functional material coating, it is important to capture the advances made in oxide deposition for plastic electronics, see‐through and wearable devices, and high‐fidelity thin film transistors on curved or flexible displays. Solution processing, even for oxides, allows control over composition, thickness, optical constants, porosity, doping, tunable optical absorbance/transmission, band structure engineering, 3D‐substrate coating, complex composite oxide formation and multi‐layered oxide systems that are more difficult to achieve using chemical vapor deposition (CVD) or atomic layer deposition (ALD) processes. We also discuss limitations of solution processing for some technologies and comment on the future of solution‐based processing of metal‐oxide materials for electronics, photonics and other technologies.

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“…32 Commonly used electron interfacial layers include titanium oxide (TiOx), [33][34][35] zinc oxide ZnO, 6,20 cesium carbonate (Cs2CO3 ) 15 and lithium fluoride (LiF). 29 Polyelectrolytes, such as polyethoxylate imine (PEI) and polyethylenimine ethoxylated PEIE are an interesting class of materials as they can be used both as electron and hole interfacial layers. [36][37] Their function is proposed to originate from the interaction of the neutral amine groups with the surface of the contact material.…”

Section: Introductionmentioning

confidence: 99%

Effects of Interfacial Layers on the Open Circuit Voltage of Polymer/Fullerene Bulk Heterojunction Devices Studied by Charge Extraction Techniques

Saekung

Wright

Clarke

et al. 2019

ACS Appl. Mater. Interfaces

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Interfacial layers are frequently used in organic solar cells performing various functions, including blocking surface recombination, improving selectivity of charge carrier extraction, modification of the work function of the contact materials and enhancing light absorption within the photoactive layer through an optical cavity effect. The aim of this work is to investigate the origin of performance enhancement of bulk heterojunction solar cells using various electron and hole interfacial layers with a particular focus on the improvement to the open circuit voltage (Voc). Solar cells using poly[N-9′-hepta-decanyl-2,7-carbazole-alt-5,5-(4′,7′-di-2-thienyl-2′,1′,3′benzothiadiazole)](PCDTBT) :)]:[6,6]-phenyl C70-butyric acid methyl ester (PC[70]BM) (1:4) active layers were prepared with a combination of polymeric, metal oxide and polyelectrolyte electron and or hole interfacial layers. Four device structures with i) no interfacial layers (reference); ii) only hole; iii) only electron; iv) both electron and hole interfacial layers were fabricated and compared using current-voltage, transient photovoltage and charge extraction measurements. The voltage gains (ΔVoc) at matched charge density due to work function modification (ΔVoc h or ΔVoc e) is distinguished from the increase in Voc due to increased charge carrier density due to longer charge carrier lifetime. At the hole contact, ΔVoc h was 0.21 V by using a PEDOT-PSS hole interfacial layer, while ΔVoc e was 0.29 V on the electron contact using a PEI-TiOx interfacial layer compared to reference devices. The electron lifetime also improved by orders of magnitude with the use of either electron or hole contact layers, contributing to a further 0.35-0.38 V increase in the open circuit voltage ((ΔVoc rec) due to increased charge density. The increased charge carrier lifetime is proposed to originate from the larger spatial separation of the electrons and holes in the device due to the increased internal field. Using both an electron and a hole interfacial layer didn't significantly increase the charge carrier lifetime compared to single interfacial layer devices, therefore the Voc didn't increase significantly. The findings presented clarify the role of interfacial layers in organic solar cells, and provides new insights into using time resolved charge extraction techniques to understand the influence of interfacial layers on the open circuit voltage.

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Aqueous Solution-Deposited Molybdenum Oxide Films as an Anode Interfacial Layer for Organic Solar Cells

Abstract: PSS. These results demonstrate the aqueous PAD technology provides an alternative strategy not only for the thin films' growth of applied materials but also for the solution processing for the low-cost fabrication of future materials to be applied in the field of solar cells.

Cited by 27 publications

References 52 publications

Polymer assisted deposition of epitaxial oxide thin films

Polymer assisted deposition of epitaxial oxide thin films

Solution Processable Metal Oxide Thin Film Deposition and Material Growth for Electronic and Photonic Devices

Effects of Interfacial Layers on the Open Circuit Voltage of Polymer/Fullerene Bulk Heterojunction Devices Studied by Charge Extraction Techniques

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