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Novel Strategies to Improve the Efficiency and Stability of Binary-Based Organic Photovoltaic Devices

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Bibliographic Details
Title: Novel Strategies to Improve the Efficiency and Stability of Binary-Based Organic Photovoltaic Devices
Authors: Abdelghafar, Enas Moustafa Mohamed
Contributors: University/Department: Universitat Rovira i Virgili. Departament d'Enginyeria Electrònica, Elèctrica i Automàtica
Thesis Advisors: Marsal Garví, Luis Francisco
Source: TDX (Tesis Doctorals en Xarxa)
Publisher Information: Universitat Rovira i Virgili, 2023.
Publication Year: 2023
Physical Description: 270 p.
Subject Terms: Organic Photovoltaics, Thermal treatment, Spray pyrolysis, Ciències
Time: 621.3
Description: The power conversion efficiency (PCE) of organic solar cells (OPVs) has been promptly improved once emerging the recently developed non-fullerene small-molecules acceptors (NFAs), approaching PCE of 20%. This remarkable increase in the power conversion efficiencies was due to the significant enhancement in the light absorption along with diminishing the energy losses, particularly upon minimizing the trade-off behavior between voltage loss and charge generation in nonfullerene organic solar cells (NF–OPVs). Despite the efficiency, long lization of OPVs. Severalstrategies have been investigated to understand the intrinsic photo-degradation mechanism in order to overcome this recent demanding subject. Some of these avenues concern the stability of the bulk-heterojunction photoactive blend microstructure through additives modifications to tune the properties of the photo-active layer.In this thesis, we combined the interfacial engineering, morphology control, and third component strategies to improve the OPV devices performance and stability. First, we conducted an intermittent spray pyrolysis approach to deposit the ZnO interfacial layers in fullerene based inverted OPVs. It significantly enhanced the interface morphology, resulting in remarkable stability behaviour of the sprayed devices. Then, we focused on optimizing the blend morphology based on the NFOPV devices through additives and thermal treatment.
Document Type: Dissertation/Thesis
File Description: application/pdf
Language: English
Access URL: http://hdl.handle.net/10803/688546
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Accession Number: edstdx.10803.688546
Database: TDX
Description
Abstract:The power conversion efficiency (PCE) of organic solar cells (OPVs) has been promptly improved once emerging the recently developed non-fullerene small-molecules acceptors (NFAs), approaching PCE of 20%. This remarkable increase in the power conversion efficiencies was due to the significant enhancement in the light absorption along with diminishing the energy losses, particularly upon minimizing the trade-off behavior between voltage loss and charge generation in nonfullerene organic solar cells (NF–OPVs). Despite the efficiency, long lization of OPVs. Severalstrategies have been investigated to understand the intrinsic photo-degradation mechanism in order to overcome this recent demanding subject. Some of these avenues concern the stability of the bulk-heterojunction photoactive blend microstructure through additives modifications to tune the properties of the photo-active layer.In this thesis, we combined the interfacial engineering, morphology control, and third component strategies to improve the OPV devices performance and stability. First, we conducted an intermittent spray pyrolysis approach to deposit the ZnO interfacial layers in fullerene based inverted OPVs. It significantly enhanced the interface morphology, resulting in remarkable stability behaviour of the sprayed devices. Then, we focused on optimizing the blend morphology based on the NFOPV devices through additives and thermal treatment.