Probing the Optical Properties of Organic Photovoltaic Materials at the Nano Scale with STEM-EELS

Philipp Christ; Julia Hönigsberger; Georg Haberfehlner; Claudia Mayrhofer; Gerald Kothleitner; Thomas Rath; Gregor Trimmel; Daniel Knez

Probing the Optical Properties of Organic Photovoltaic Materials at the Nano Scale with STEM-EELS

Research output: Chapter in Book/Report/Conference proceeding › Conference paper › peer-review

Abstract

To analyze the effects of sun aging and degradation in organic photovoltaic (OPV) cells, it is essential to quantify changes in the light absorption characteristics of the active material [2]. We present a method based on scanning transmission electron microscopy and electron energy loss spectroscopy (STEM-EELS) combined with Kramers-Kronig Analysis (KKA) to determine the optical properties of OPV materials at the nanoscale [1]. Specifically, we eval-uate the optical range from 3.1 eV to 1.24 eV using machine learning- assisted processing steps. To obtain the scattering distribution (SD), the EELS data was processed using Rich-ardson-Lucy deconvolution (RLD) and zero-loss peak (ZLP) subtraction via vacuum EELS data. The SD was further an-alyzed with KKA, yielding a full spectrum image (SI) of the absorption properties.

Original language	English
Title of host publication	15th Workshop of the Austrian Society for Microscopy
Place of Publication	Leoben
Chapter	Talks
Pages	23
Publication status	Published - 2025
Event	15th ASEM Workshop 2025 - Montanuniverstität Leoben, Leoben, Austria Duration: 24 Apr 2025 → 25 Apr 2025 https://www.unileoben.ac.at/asemworkshop2025/

Conference

Conference	15th ASEM Workshop 2025
Country/Territory	Austria
City	Leoben
Period	24/04/25 → 25/04/25
Internet address	https://www.unileoben.ac.at/asemworkshop2025/

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

ASJC Scopus subject areas

General Materials Science

Fields of Expertise

Advanced Materials Science

Access to Document

https://www.unileoben.ac.at/asemworkshop2025/workshop-program/abstract-bookLicence: Unspecified

Cite this

Christ, P , Hönigsberger, J , Haberfehlner, G , Mayrhofer, C , Kothleitner, G , Rath, T , Trimmel, G & Knez, D 2025, Probing the Optical Properties of Organic Photovoltaic Materials at the Nano Scale with STEM-EELS. in 15th Workshop of the Austrian Society for Microscopy. Leoben, pp. 23, 15th ASEM Workshop 2025, Leoben, Austria, 24/04/25. <https://www.unileoben.ac.at/asemworkshop2025/workshop-program/abstract-book>

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title = "Probing the Optical Properties of Organic Photovoltaic Materials at the Nano Scale with STEM-EELS",

abstract = "To analyze the effects of sun aging and degradation in organic photovoltaic (OPV) cells, it is essential to quantify changes in the light absorption characteristics of the active material [2]. We present a method based on scanning transmission electron microscopy and electron energy loss spectroscopy (STEM-EELS) combined with Kramers-Kronig Analysis (KKA) to determine the optical properties of OPV materials at the nanoscale [1]. Specifically, we eval-uate the optical range from 3.1 eV to 1.24 eV using machine learning- assisted processing steps. To obtain the scattering distribution (SD), the EELS data was processed using Rich-ardson-Lucy deconvolution (RLD) and zero-loss peak (ZLP) subtraction via vacuum EELS data. The SD was further an-alyzed with KKA, yielding a full spectrum image (SI) of the absorption properties.",

author = "Philipp Christ and Julia H{\"o}nigsberger and Georg Haberfehlner and Claudia Mayrhofer and Gerald Kothleitner and Thomas Rath and Gregor Trimmel and Daniel Knez",

year = "2025",

language = "English",

pages = "23",

booktitle = "15th Workshop of the Austrian Society for Microscopy",

note = "15th ASEM Workshop 2025 ; Conference date: 24-04-2025 Through 25-04-2025",

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TY - GEN

T1 - Probing the Optical Properties of Organic Photovoltaic Materials at the Nano Scale with STEM-EELS

AU - Christ, Philipp

AU - Hönigsberger, Julia

AU - Haberfehlner, Georg

AU - Mayrhofer, Claudia

AU - Kothleitner, Gerald

AU - Rath, Thomas

AU - Trimmel, Gregor

AU - Knez, Daniel

PY - 2025

Y1 - 2025

N2 - To analyze the effects of sun aging and degradation in organic photovoltaic (OPV) cells, it is essential to quantify changes in the light absorption characteristics of the active material [2]. We present a method based on scanning transmission electron microscopy and electron energy loss spectroscopy (STEM-EELS) combined with Kramers-Kronig Analysis (KKA) to determine the optical properties of OPV materials at the nanoscale [1]. Specifically, we eval-uate the optical range from 3.1 eV to 1.24 eV using machine learning- assisted processing steps. To obtain the scattering distribution (SD), the EELS data was processed using Rich-ardson-Lucy deconvolution (RLD) and zero-loss peak (ZLP) subtraction via vacuum EELS data. The SD was further an-alyzed with KKA, yielding a full spectrum image (SI) of the absorption properties.

AB - To analyze the effects of sun aging and degradation in organic photovoltaic (OPV) cells, it is essential to quantify changes in the light absorption characteristics of the active material [2]. We present a method based on scanning transmission electron microscopy and electron energy loss spectroscopy (STEM-EELS) combined with Kramers-Kronig Analysis (KKA) to determine the optical properties of OPV materials at the nanoscale [1]. Specifically, we eval-uate the optical range from 3.1 eV to 1.24 eV using machine learning- assisted processing steps. To obtain the scattering distribution (SD), the EELS data was processed using Rich-ardson-Lucy deconvolution (RLD) and zero-loss peak (ZLP) subtraction via vacuum EELS data. The SD was further an-alyzed with KKA, yielding a full spectrum image (SI) of the absorption properties.

M3 - Conference paper

SP - 23

BT - 15th Workshop of the Austrian Society for Microscopy

CY - Leoben

T2 - 15th ASEM Workshop 2025

Y2 - 24 April 2025 through 25 April 2025

ER -

Probing the Optical Properties of Organic Photovoltaic Materials at the Nano Scale with STEM-EELS

Abstract

Conference

UN SDGs

ASJC Scopus subject areas

Fields of Expertise

Access to Document

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Cite this