Direct measurement of electron affinity of carbazole-based self-assembled monolayer used as hole-selective layer in high-efficiency perovskite solar cells-Reference-Cited by-同舟云学术

Direct measurement of electron affinity of carbazole-based self-assembled monolayer used as hole-selective layer in high-efficiency perovskite solar cells

Published:2024-06-10 Issue:24 Volume:124 Page:
ISSN:0003-6951
Container-title:Applied Physics Letters
language:en
Short-container-title:

Author:

Akatsuka Aruto¹,Miura Makoto¹,Kapil Gaurav²^ORCID,Hayase Shuzi²³^ORCID,Yoshida Hiroyuki¹⁴^ORCID

Affiliation:

1. Graduate School of Engineering, Chiba University 1 , 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan

2. i-Powered Energy System Research Center, The University of Electro-Communications 2 , 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan

3. Graduate School of Informatics and Engineering, The University of Electro-Communications 3 , 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan

4. Molecular Chirality Research Center, Chiba University 4 , 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan

Abstract

Carbazole-based self-assembled monolayers have received considerable attention as hole-selective layers (HSLs) in inverted perovskite solar cells. As an HSL, the electron-blocking capability is important and directly related to electron affinity (EA). Low-energy inverse photoelectron spectroscopy (LEIPS) is the most reliable method for EA measurement. However, the intense electron-impact-induced fluorescence from carbazole interferes with their measurement. By improving the photon detector, we were able to measure 2PACz and MeO-2PACz LEIPS spectra and determine their respective EAs of 1.72 and 1.48 eV. These small EA values ensure effective electron-blocking capability of HSLs regardless of the type of perovskite layer.

Funder

JST-Mirai Program

Japan Society for the Promotion of Science

Publisher

AIP Publishing

Link

https://pubs.aip.org/aip/apl/article-pdf/doi/10.1063/5.0215268/19995057/241603_1_5.0215268.pdf

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