Electronic Uniformity in Template-Grown CsPbBr₃ Nanorods

We synthesize all-inorganic perovskite CsPbBr₃ NRs with tailored dimensions, using amphiphilic bottlebrush-like block copolymer (BBCP) as nanoreactors [1]. A novel contactless scanning probe microscopy (SPM)-based imaging technique, dielectric force microscopy (DFM), is employed to study the electronic properties in template-grown CsPbBr₃ NRs. We find that all freshly prepared CsPbBr₃ NRs exhibit ambipolar behaviors which remain up to two months [2]. A transition from ambipolar to p-type behaviors occur after two months, and nearly all CsPbBr₃ NRs change to p-type within two weeks [2]. Furthermore, template-grown CsPbBr₃ NRs display improved nanoscale electronic homogeneity compared to CsPbBr₃ NWs synthesized via a conventional hot-injection method [3]. Our work shows that template-grown CsPbBr₃ NRs are promising materials for optoelectronic applications.

References:

[1] S. Liang, M. Zhang, S. He, M. Tian, W. Choi, T. Lian, and Z. Lin, Nat. Synth. 2, 719-728 (2023).

[2] E. Avila-Lopez, S. Liang, I. Elias, Z. Lin, and Y. S. Li, submitted (2023).

[3] Y. S. Li, S. Liang, T. Trieu, R. R. Bautista, and Z. Lin, ACS Appl. Energy Mater. 5, 4431-4438 (2022).