Understanding the role of interfacial layers in the photostability of PM6:Y7-based organic solar cells under different degradation conditions

Ramirez-Como, Magaly; Moustafa, Enas; Samir, Mohamed; Torimtubun, Alfonsina Abat Amelenan; Sánchez, José G.; Pallarès, Josep; Marsal, Lluís F.

doi:10.1039/d3se00703k

Cited by 5 publications

References 72 publications

(109 reference statements)

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A Facile Low Prevacuum Treatment to Enhance the Durability of Nonfullerene Organic Solar Cells

Samir,

Sacramento,

Almora

et al. 2024

Solar RRL

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Herein, a straightforward vacuum‐assisted method is introduced to enhance the stability of nonfullerene organic solar cells (OSCs). The method, termed “prevacuum” involves subjecting the active layer (D18:Y6) to a low‐pressure vacuum (−1 bar) before thermal annealing at 100 °C. Compared to untreated devices, prevacuum‐treated OSCs exhibit a notable increase in power conversion efficiency from 13.71% to 14.90%. This enhancement is attributed to improved light absorption and charge extraction, as evidenced by external quantum efficiency measurements. Moreover, prevacuum treatment significantly improves device stability under operational conditions, with a 30% power loss occurring after 8.25 h compared to 4.5 h for untreated devices. This improvement is attributed to the removal of volatile components and impurities during the vacuum process, leading to a more hydrophobic and stable active layer. The study demonstrates the efficacy of prevacuum treatment as a simple and accessible method for enhancing the performance and longevity of OSCs, paving the way for their broader application in sustainable energy technologies.

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A Facile Low Prevacuum Treatment to Enhance the Durability of Nonfullerene Organic Solar Cells

Samir,

Sacramento,

Almora

et al. 2024

Solar RRL

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Effect of doping the PM6:Y7 active layer with MoS2 nanospheres in organic solar cells

Amargós-Reyes,

Dzib-Chalé,

Maldonado

et al. 2024

Journal of Molecular Structure

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Photovoltaic Performance, Optical Current Loss Simulation, and Conductive Atomic Force Microscopy Analysis of Organic Solar Cells Based on PM6:Y7

Carrillo-Sendejas,

Plaza-Martinez,

Maldonado

et al. 2024

ACS Appl. Energy Mater.

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In this work, an investigation of the photovoltaic (PV) performance of organic solar cells (OSCs) based on PM6:Y7, in combination with a conductive atomic force microscopy (c-AFM) study, is presented. OSCs were fabricated and tested under regular atmospheric conditions, employing the conventional structure glass/ITO/PEDOT:PSS/PM6:Y7/PFN/Field’s metal (FM) where FM, a eutectic alloy of Bi, In, and Sn, served as an alternative top electrode, deposited easily via drop casting at 95 °C, eliminating the requirement of a high-vacuum chamber. An optimum active film thickness of 72 nm is identified for the PV devices, reaching a power conversion efficiency (PCE) of 11.44 ± 0.22% (best PCE = 11.76%). Further, optical constants (n and k) were determined for PEDOT:PSS, PM6:Y7, and PFN films via modeling of transmittance data; these parameters were used to simulate the external quantum efficiency response, which provided the optical performance-limiting factors across all cell layers and interfaces within the OSC. Likewise, topography measurements showed that the 72 nm-thick PM6:Y7 film exhibited a relatively low roughness of 1.7 nm, obtained without the use of postprocessing methods. The c-AFM quantitative analysis was carried out on the active film with and without the electron transport interfacial layer (PFN) of the cell structure, which confirmed that the addition of PFN on top of PM6:Y7 enhanced conductive pathways with high current and low resistance values.

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Understanding the role of interfacial layers in the photostability of PM6:Y7-based organic solar cells under different degradation conditions

Abstract: Organic solar cells (OSCs) have reached an efficiency near 20%, however, their low long-term stability is the main limit to their industrialization. In this work, we investigated the degradation of...

Cited by 5 publications

References 72 publications

A Facile Low Prevacuum Treatment to Enhance the Durability of Nonfullerene Organic Solar Cells

A Facile Low Prevacuum Treatment to Enhance the Durability of Nonfullerene Organic Solar Cells

Effect of doping the PM6:Y7 active layer with MoS2 nanospheres in organic solar cells

Photovoltaic Performance, Optical Current Loss Simulation, and Conductive Atomic Force Microscopy Analysis of Organic Solar Cells Based on PM6:Y7

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