Tweaking the band gap and photoluminescence of CsPbI3 perovskite by Mn alloying

Nivedita Pandey; Subhananda Chakrabarti

doi:10.1117/12.2620036

24 May 2022 Tweaking the band gap and photoluminescence of CsPbI₃ perovskite by Mn alloying

Proceedings Volume 12150, Photonics for Solar Energy Systems IX; 1215002 (2022) https://doi.org/10.1117/12.2620036
Event: SPIE Photonics Europe, 2022, Strasbourg, France

Abstract

Alloying semiconductor nanocrystals with impurity can stabilize their phase with modulation of their morphology, lattice structure, photophysical and electronic properties which enhance their suitability towards solar cells and light-emitting diodes (LEDs). Herein we sought to substitute Mn²⁺ in CsPbI₃ nanoparticles (NPs) to overcome the phase transformation issue as well as to tune the electronic and optical properties of this perovskite material. The phase of the alloyed CsPbI₃ NPs was stabilized endowing high crystalline quality which can be clearly seen in X-ray diffraction (XRD). XRD plot depicts that impurity peaks arise in the case of CsPbI₃ NPs while the phase of Mn²⁺ alloyed NPs was stabilized upto 1 month. The decrease in lattice parameter values from 6.019 Å to 5.987 Å has been observed for pure CsPbI₃ and alloyed CsPbI₃ NPs respectively attributed to the reduction of the size of the cubic phase crystal structure due to the introduction of small size Mn²⁺ in place of large-sized Pb²⁺. The decrement in the lattice parameter further confirms the alloying of CsPbI₃ NPs with Mn²⁺. The absorption and emission peaks were tweaked in the synthesized CsPbI3 NPs after alloying which can be observed from the absorption spectrum and photoluminescence (PL). Alloying of CsPbI₃ NPs with Mn²⁺ leads to shifting in bandgap from 1.70 eV to 1.79 eV, PL peak from 671 nm to 654 nm, and absorption spectrum from 645 nm to 637 nm which suggest the tailoring of its novel properties. This investigation suggests the suitability of Mn²⁺ alloyed CsPbI₃ NPs in the area of optoelectronics.

Conference Presentation

Citation Download Citation

Nivedita Pandey and Subhananda Chakrabarti "Tweaking the band gap and photoluminescence of CsPbI₃ perovskite by Mn alloying", Proc. SPIE 12150, Photonics for Solar Energy Systems IX, 1215002 (24 May 2022); https://doi.org/10.1117/12.2620036

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available