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Ph-D Mid-term seminars series: Characterization of 2D hybrid organic-inorganic metal-halide perovskites for spintronic and optoelectronic devices

CIC nanoGUNE Seminars

Speaker
Yaiza Asensio
Nanodevices group, CIC nanoGUNE
When
2023/10/23
11:00
Place
CIC nanoGUNE, Avenida de Tolosa 76. 20018 Donostia / San Sebastián
Host
Beatriz Martin García
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Ph-D Mid-term seminars series: Characterization of 2D hybrid organic-inorganic metal-halide perovskites for spintronic and optoelectronic devices

The significant growth, development, and evolution of technologies such as optoelectronics and spintronics have been always accompanied by the access to materials with targeted and extraordinary properties. Among these materials, hybrid organic-inorganic metal-halide perovskites (HOIPs) have demonstrated outstanding optoelectronic performance in photovoltaics, LEDs and photodetectors[1,2], and potential application in spintronic devices[3-5]. However, there is not a clear understanding of how both the crystal structure and the composition of HOIPs affect their properties. Here, we conducted a detailed study to comprehend the effect of the transition metal (Cu2+, Mn2+and Co2+) and organic spacer (alkyl- and aryl-ammonium) on their magnetic properties. In particular, our results show that an increase in the in-plane anisotropy together with a decrease in the interlayer distance of Cu2+ HOIPs lead to a change in their magnetic behavior from a 2D ferromagnet to a quasi-3D antiferromagnet[6]. Furthermore, we explore the incorporation of chiral organic molecules into lead-free perovskite frameworks, achieving values for the degree of circularly polarized photoluminescence comparable to the ones of lead-based HOIPs[7]. These findings contribute to a deeper understanding of HOIPs, unveiling their potential for future technologies.

 

 

 

[1]   J. Xing, et al. Nat Commun, 9, 3541 (2018)

[2]   H. Wang, et al. Adv. Mater. 33, 2003309 (2021)

[3]   Q. Wei, et al. ACS Mater. Lett, 3, 1266-1275 (2021)

[4]   G. Long, et al. Nat. Photonics, 12, 528-533 (2018)

[5]   A. Privitera, et al. Adv. Opt. Mater. 9, 2100215 (2021)

[6]   Y. Asensio, et al. Adv. Funct. Mater. 32, 2207988 (2022)

[7]   J. Ma, et al. ACS Nano, 13, 3659–3665 (2019)