Hybrid Germanium Iodide Perovskite Semiconductors: Active Lone Pairs, Structural Distortions, Direct and Indirect Energy Gaps, and Strong Nonlinear Optical Properties

Stoumpos, Constantinos C.; Frazer, Laszlo; Clark, Daniel J.; Kim, Yong Soo; Rhim, S. H.; Freeman, A. J.; Ketterson, J. B.; Jang, Joon I.; Kanatzidis, Mercouri G.

doi:10.1021/jacs.5b01025

articleJournal of the American Chemical SocietyMay 7, 2015Closed access

Hybrid Germanium Iodide Perovskite Semiconductors: Active Lone Pairs, Structural Distortions, Direct and Indirect Energy Gaps, and Strong Nonlinear Optical Properties

CCConstantinos C. Stoumpos LFLaszlo Frazer DJDaniel J. Clark YSYong Soo Kim SHS. H. Rhim

Northwestern University · Binghamton University · +1 more institution

PubMed

Indexed incrossrefpubmed

Abstract

The synthesis and properties of the hybrid organic/inorganic germanium perovskite compounds, AGeI3, are reported (A = Cs, organic cation). The systematic study of this reaction system led to the isolation of 6 new hybrid semiconductors. Using CsGeI3 (1) as the prototype compound, we have prepared methylammonium, CH3NH3GeI3 (2), formamidinium, HC(NH2)2GeI3 (3), acetamidinium, CH3C(NH2)2GeI3 (4), guanidinium, C(NH2)3GeI3 (5), trimethylammonium, (CH3)3NHGeI3 (6), and isopropylammonium, (CH3)2C(H)NH3GeI3 (7) analogues. The crystal structures of the compounds are classified based on their dimensionality with 1–4 forming 3D perovskite frameworks and 5–7 1D infinite chains. Compounds 1–7, with the exception of…

Citation impact

917

total citations

FWCI: 42.97
Percentile: 100%
References: 88

Citations per year

Authors

9

Topics & keywords

Topics

Keywords

Chemistry
Formamidinium
Acentric factor
Perovskite (structure)
Band gap
Density functional theory
Germanium
Second-harmonic generation

UN Sustainable Development Goals

Affordable and clean energy

No related works found for this paper.