Correlating structure and electronic band-edge properties in organolead halide perovskites nanoparticles

Qiushi Zhu; Kaibo Zheng; Mohamed Abdellah; Alexander Generalov; Dörthe Haase; Stefan Carlson; Yuran Niu; Jimmy Heimdal; Anders Engdahl; Maria E. Messing; Tonu Pullerits; Sophie E. Canton

doi:10.1039/C6CP01843B

Correlating structure and electronic band-edge properties in organolead halide perovskites nanoparticles†

Qiushi Zhu,^a Kaibo Zheng,^bc Mohamed Abdellah,^bd Alexander Generalov,^e Dörthe Haase,^e Stefan Carlson,^e Yuran Niu,^e Jimmy Heimdal,^e Anders Engdahl,^e Maria E. Messing,^f Tonu Pullerits*^b and Sophie E. Canton*^gh

Author affiliations

* Corresponding authors

^a Department of Synchrotron Radiation Instrumentation, Lund University, Box 118, Lund, Sweden

^b Department of Chemical Physics, Lund University, Box 124, Lund, Sweden
E-mail: tonu.pullerits@chemphys.lu.se

^c Gas Processing Center, College of Engineering, Qatar University, P.O. Box 2713, Doha, Qatar

^d Department of Chemistry, Qena Faculty of Science, South Valley University, Qena 83523, Egypt

^e MAX IV Laboratory, Lund University, Box 118, Lund, Sweden

^f Department of Solid State Physics, Lund University, Box 118, Lund, Sweden

^g IFG Structural Dynamics of (Bio)chemical Systems, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, D-37077 Goettingen, Germany
E-mail: sophie.canton@desy.de

^h FS-SCS, Structural Dynamics with Ultra-short Pulsed X-rays, Deutsches Elektronensynchrotron DESY, Notkestrasse 85, D-22607 Hamburg, Germany

Abstract

After having emerged as primary contenders in the race for highly efficient optoelectronics materials, organolead halide perovskites (OHLP) are now being investigated in the nanoscale regime as promising building blocks with unique properties. For example, unlike their bulk counterpart, quantum dots of OHLP are brightly luminescent, owing to large exciton binding energies that cannot be rationalized solely on the basis of quantum confinement. Here, we establish the direct correlation between the structure and the electronic band-edge properties of CH₃NH₃PbBr₃ nanoparticles. Complementary structural and spectroscopic measurements probing long-range and local order reveal that lattice strain influences the nature of the valence band and modifies the subtle stereochemical activity of the Pb²⁺ lone-pair. More generally, this work demonstrates that the stereochemical activity of the lone-pair at the metal site is a specific physicochemical parameter coupled to composition, size and strain, which can be employed to engineer novel functionalities in OHLP nanomaterials.

Physical Chemistry Chemical Physics

Correlating structure and electronic band-edge properties in organolead halide perovskites nanoparticles†

Abstract

Supplementary files

Article information

Download Citation

Permissions

Correlating structure and electronic band-edge properties in organolead halide perovskites nanoparticles

Social activity

Search articles by author

Spotlight

Advertisements