Results 21 to 30 of about 10,585 (284)

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, Germán Rodrı́guez-López, Diego Solis-Ibarra   +2 more
openaire   +1 more source

Hybrid Layered Double Perovskite Halides of Transition Metals

Journal of the American Chemical Society, 2022
Hybrid layered double perovskite (HLDP) halides comprise hexacoordinated 1+ and 3+ metals in the octahedral sites within a perovskite layer and organic amine cations between the layers. Progress on such materials has hitherto been limited to compounds containing main group 3+ ions isoelectronic with PbII (such as SbIII and BiIII). Here, we report eight
Pratap Vishnoi, Julia L. Zuo, Xiaotong Li, Devesh Chandra Binwal, Kira E. Wyckoff, Lingling Mao, Linus Kautzsch, Guang Wu, Stephen D. Wilson, Mercouri G. Kanatzidis, Ram Seshadri, Anthony K. Cheetham   +11 more
openaire   +4 more sources

Bandgap Engineering of Lead-Free Halide Double Perovskites

Proceedings of the 13th Conference on Hybrid and Organic Photovoltaics, 2021
Lead-free halide double perovskites (HDPs, A2BIBIIIX6) with attractive optical and electronic features are regarded as one of the most promising alternatives to overcome the toxicity and stability issues of lead halide perovskites. They provide a wide range of possible combinations and rich substitutional chemistry with interesting properties for ...
Fuxiang ji, Feng Gao, Weihua Ning, Feng Wang   +3 more
  +6 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, Gerbrand Ceder, Carolin M. Sutter-Fella   +4 more
openaire   +3 more sources

Double Charged Surface Layers in Lead Halide Perovskite Crystals [PDF]

Nano Letters, 2017
Understanding defect chemistry, particularly ion migration, and its significant effect on the surface's optical and electronic properties is one of the major challenges impeding the development of hybrid perovskite-based devices. Here, using both experimental and theoretical approaches, we demonstrated that the surface layers of the perovskite crystals
Smritakshi P. Sarmah, Victor M. Burlakov, Emre Yengel, Banavoth Murali, Erkki Alarousu, Ahmed M. El-Zohry, Chen Yang, Mohd S. Alias, Ayan A. Zhumekenov, Makhsud I. Saidaminov, Namchul Cho, Nimer Wehbe, Somak Mitra, Idris Ajia, Sukumar Dey, Ahmed E. Mansour, Maged Abdelsamie, Aram Amassian, Iman S. Roqan, Boon S. Ooi, Alain Goriely, Osman M. Bakr, Omar F. Mohammed   +22 more
openaire   +3 more sources

Tuning Defects in a Halide Double Perovskite with Pressure

Journal of the American Chemical Society, 2022
Dopant defects in semiconductors can trap charge carriers or ionize to produce charge carriers─playing a critical role in electronic transport. Halide perovskites are a technologically important semiconductor family with a large pressure response.
Nathan R. Wolf, Adam Jaffe, Adam H. Slavney, Wendy L. Mao, Linn Leppert, Hemamala I. Karunadasa   +5 more
openaire   +2 more sources

Small‐Band‐Gap Halide Double Perovskites

Angewandte Chemie, 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, Abraham Saldivar Valdes, Davide Bartesaghi, Tom J. Savenije, Jeffrey B. Neaton, Hemamala I. Karunadasa   +6 more
openaire   +4 more sources

Lead-free perovskite solar cells, what's next?

Next Energy, 2023
Although lead halide perovskite solar cells (PSCs) have achieved an efficiency of 25.7 %, the highly toxic composition, element lead, will hinder the use of PSCs in indoor photovoltaics, building-integrated photovoltaics and wearable devices.
Xinhui Luo, Xiao Liu, Liyuan Han
doaj   +1 more source

Capillary-Bridge Controlled Patterning of Stable Double-Perovskite Microwire Arrays for Non-toxic Photodetectors

Frontiers in Chemistry, 2020
Single-crystalline lead halide perovskites with remarkable physical properties offer great potential in integrated optoelectronic applications but are restricted by their instability and toxicity.
Yueyang Pi, Jinjin Zhao, Jinjin Zhao, Yingjie Zhao, Yingjie Zhao, Jiangang Feng, Chi Zhang, Hanfei Gao, Hanfei Gao, Yuchen Wu, Lei Jiang, Lei Jiang   +11 more
doaj   +1 more source

The bandgap regulation and optical properties of alloyed Cs2NaSbX6 (X=Cl, Br, I) systems with first principle method

Journal of Materials Research and Technology, 2021
Lead-free halide double perovskite materials have the advantages of optical absorption efficiency, carrier mobility, adjustable bandgap, defect tolerance, wide variety of raw materials, low price, etc.
Chundan Lin, Yuying Zhao, Yanbing Liu, Wansong Zhang, Changjin Shao, Zhenqing Yang   +5 more
doaj   +1 more source