Development of organic-inorganic hybrid selective layers via vapor phase infiltration to enhance the durability of perovskite solar cells

Technical Report · Mon Oct 31 04:00:00 EDT 2022

DOI:https://doi.org/10.2172/2205162· OSTI ID:2205162

Correa-Baena, Juan-Pablo ^[1]; Losego, Mark ^[2]; Castro, Andres ^[2]; Wooding, Jamie ^[2]

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1. Georgia Inst. of Technology, Atlanta, GA (United States). Georgia Tech Research Institute; Georgia Institute Of Technology
2. Georgia Inst. of Technology, Atlanta, GA (United States). Georgia Tech Research Institute

Despite the rapid increase in power conversion efficiency (PCE) of perovskite solar cells (PSCs) over the last decade, stability remains a major roadblock to commercialization. This work proposes the use of vapor phase infiltration (VPI) as a tool to create hybrid organic-inorganic layers that improve the stability of organic charge transport layers, such as hole-selective spiro-OMeTAD in these PSC and other organic electronic devices. Using X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS), and grazing incident wide-angle X-ray scattering (GIWAXS), we identify that infiltration of TiO_X via VPI hinders the crystallization of the spiro-OMeTAD layer by likely preventing the π- π stacking of the molecules. Infiltrated PSCs retained around 80% of their original efficiency after an operando stability test of 60 h at 75 °C, double the efficiency retained by devices without infiltration. This work provides a blueprint for using VPI to stabilize organic charge transport layers via prevention of π- π stacking that leads to deleterious crystallization that shortens device lifetimes.

• Research Organization: Georgia Inst. of Technology, Atlanta, GA (United States). Georgia Tech Research Institute
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
• DOE Contract Number: EE0009369
• OSTI ID: 2205162
• Report Number(s): 9369_FTR_GeorgiaInstituteofTechnology
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY