Results 241 to 250 of about 8,966 (267)

Doubling the Stakes: The Promise of Halide Double Perovskites

Angewandte Chemie - International Edition, 2021
AbstractWhen the stakes are doubled in a wager, a player must correctly place two consecutive bets to win, but the payout is larger. Similarly, two B sites in combination dictate the properties of A2BB′X6 (A=monocation, X=halide) double perovskites.
Nathan R Wolf, Bridget A Connor, Adam H Slavney   +2 more
exaly   +3 more sources

Small‐Band‐Gap Halide Double Perovskites

Angewandte Chemie - International Edition, 2018
AbstractDespite their compositional versatility, most halide double perovskites feature large band gaps. Herein, we describe a strategy for achieving small band gaps in this family of materials. The new double perovskites Cs2AgTlX6 (X=Cl (1) and Br (2)) have direct band gaps of 2.0 and 0.95 eV, respectively, which are approximately 1 eV lower than ...
Adam H Slavney, Linn Leppert, Davide Bartesaghi   +2 more
exaly   +5 more sources

The Emergence of Halide Layered Double Perovskites [PDF]

ACS Energy Letters, 2020
Halide double perovskites have allowed the significant expansion of the possible metals and oxidation states in halide perovskites.
Brenda Vargas, Diego Solis-Ibarra
exaly   +2 more sources

Progress of Lead‐Free Halide Double Perovskites

Advanced Energy Materials, 2019
AbstractThe field of halide metal perovskite photovoltaics has caught widespread interest in the last decade. This is seen in the rapid rise of power conversion efficiency, which is currently over 23%. It has also stimulated a widespread application of halide metal perovskites in other fields, such as light‐emitting diodes, field‐effect transistors ...
Femi Igbari, Zhao-Kui Wang, Liang-Sheng Liao   +2 more
exaly   +2 more sources

Synthetic approaches for thin-film halide double perovskites [PDF]

Matter, 2021
Summary Inspired by the fascinating class of hybrid organic-inorganic halide perovskite materials, halide double perovskites have emerged as non-toxic Pb-free contenders for application as active layers in optoelectronic devices. Heterovalent substitution of Pb2+ by non-toxic metal cations yields the double-perovskite structure, which allows for ...
Yihui Zhao, Kevin Cruse, Maged Abdelsamie   +2 more
exaly   +4 more sources

Epitaxial Halide Perovskite Lateral Double Heterostructure

ACS Nano, 2017
Epitaxial III-V semiconductor heterostructures are key components in modern microelectronics, electro-optics, and optoelectronics. With superior semiconducting properties, halide perovskite materials are rising as promising candidates for coherent heterostructure devices. In this report, spinodal decomposition is proposed and experimentally implemented
Yiping Wang, Zhizhong Chen, Felix Deschler, Xin Sun, Toh-Ming Lu, Esther A. Wertz, Jia-Mian Hu, Jian Shi   +7 more
openaire   +2 more sources

Unique Behavior of Halide Double Perovskites with Mixed Halogens

ACS Applied Materials & Interfaces, 2020
Engineering halide double perovskite (A2M+M3+XVII6) by mixing elements is a viable way to tune its electronic and optical properties. In spite of many emerging experiments on halide double perovskite alloys, the basic electronic properties of the alloys have not been fully understood.
Dan Han, Masako Ogura, Andreas Held, Hubert Ebert   +3 more
openaire   +2 more sources

Rational Design of Halide Double Perovskites for Optoelectronic Applications [PDF]

Joule, 2018
Summary Practical application of hybrid Pb-based halide perovskites needs not only to fabricate high-quality film samples on a large scale but also to properly overcome the issues of Pb toxicity and materials instability. Finding new, stable, Pb-free perovskites currently attracts significant research interest.
Xin-Gang Zhao, Dongwen Yang, Ji-Chang Ren   +2 more
exaly   +2 more sources

Entropy-Driven Stabilization of Multielement Halide Double-Perovskite Alloys

The Journal of Physical Chemistry Letters, 2022
Currently, a major obstacle restricting the commercial application of halide perovskites is their low thermodynamic stability. Herein, inspired by the high-stability high-entropy alloys, we theoretically investigated a variety of multielement double-perovskite alloys. First-principles calculations show that the entropy contribution to Gibbs free energy,
Xinjiang Wang, Jingxiu Yang, Xueting Wang, Muhammad Faizan, Hongshuai Zou, Kun Zhou, Bangyu Xing, Yuhao Fu, Lijun Zhang   +8 more
openaire   +2 more sources

Lead‐Free Silver‐Bismuth Halide Double Perovskite Nanocrystals

Angewandte Chemie International Edition, 2018
AbstractLead‐free perovskite nanocrystals (NCs) were obtained mainly by substituting a Pb2+ cation with a divalent cation or substituting three Pb2+ cations with two trivalent cations. The substitution of two Pb2+ cations with one monovalent Ag+ and one trivalent Bi3+ cations was used to synthesize Cs2AgBiX6 (X=Cl, Br, I) double perovskite NCs.
Bin Yang, Junsheng Chen, Songqiu Yang, Feng Hong, Lei Sun, Peigeng Han, Tõnu Pullerits, Weiqiao Deng, Keli Han   +8 more
openaire   +3 more sources