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Carl AD, Kalan RE, Obayemi JD, et al. Synthesis and Characterization of Alkylamine-Functionalized Si(111) for Perovskite Adhesion With Minimal Interfacial Oxidation or Electronic Defects. ACS Appl Mater Interfaces. 2017;9(39):34377-34388doi: 10.1021/acsami.7b07117.
Carl, A. D., Kalan, R. E., Obayemi, J. D., Zebaze Kana, M. G., Soboyejo, W. O., & Grimm, R. L. (2017). Synthesis and Characterization of Alkylamine-Functionalized Si(111) for Perovskite Adhesion With Minimal Interfacial Oxidation or Electronic Defects. ACS applied materials & interfaces, 9(39), 34377-34388. https://doi.org/10.1021/acsami.7b07117
Carl, Alexander D, et al. "Synthesis and Characterization of Alkylamine-Functionalized Si(111) for Perovskite Adhesion With Minimal Interfacial Oxidation or Electronic Defects." ACS applied materials & interfaces vol. 9,39 (2017): 34377-34388. doi: https://doi.org/10.1021/acsami.7b07117
Carl AD, Kalan RE, Obayemi JD, Zebaze Kana MG, Soboyejo WO, Grimm RL. Synthesis and Characterization of Alkylamine-Functionalized Si(111) for Perovskite Adhesion With Minimal Interfacial Oxidation or Electronic Defects. ACS Appl Mater Interfaces. 2017 Oct 04;9(39):34377-34388. doi: 10.1021/acsami.7b07117. Epub 2017 Sep 20. PMID: 28880534.
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ACS Appl Mater Interfaces. 2017 Oct 04;9(39):34377-34388. doi: 10.1021/acsami.7b07117. Epub 2017 Sep 20.

Synthesis and Characterization of Alkylamine-Functionalized Si(111) for Perovskite Adhesion With Minimal Interfacial Oxidation or Electronic Defects.

ACS applied materials & interfaces

Alexander D Carl, Roghi E Kalan, John David Obayemi, Martiale Gaetan Zebaze Kana, Winston Oluwole Soboyejo, Ronald L Grimm

Affiliations

  1. Department of Chemistry and Biochemistry, Life Science and Bioengineering Center, Worcester Polytechnic Institute , 100 Institute Road, Worcester, Massachusetts 01609, United States.
  2. Department of Mechanical Engineering, Worcester Polytechnic Institute , 100 Institute Road, Worcester, Massachusetts 01609, United States.
  3. Department of Materials Science and Engineering, Kwara State University , PMB 1531, Malete, Kwara State 23431, Nigeria.

PMID: 28880534 DOI: 10.1021/acsami.7b07117

Abstract

We investigated synthetic strategies for the functionalization of Si(111) surfaces with organic species containing amine moieties. We employed the functionalized surfaces to chemically "glue" perovskites to silicon with efficient electron transfer and minimal oxidation leading to deleterious recombination at the silicon substrate. A two-step halogenation-alkylation reaction produced a mixed allyl-methyl monolayer on Si(111). Subsequent reactions utilized multiple methods of brominating the allyl double bond including reaction with HBr in acetic acid, HBr in THF, and molecular bromine in dichloromethane. Reaction with ammonia in methanol effected conversion of the bromide to the amine. X-ray photoelectron spectroscopy (XPS) quantified chemical states and coverages, transient-microwave photoconductivity ascertained photogenerated carrier lifetimes, atomic force microscopy (AFM) quantified perovskite-silicon adhesion, and nonaqueous photoelectrochemistry explored solar-energy-conversion performance. The HBr bromination followed by the amination yielded a surface with ∼10% amine sites on the Si(111) with minimal oxide and surface recombination velocity values below 120 cm s

Keywords: X-ray photoelectron spectroscopy; perovskite; photoelectrochemistry; silicon; tandem-junction solar cell

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