Results 21 to 30 of about 10,754 (283)

Two-Dimensional Halide Pb-Perovskite–Double Perovskite Epitaxial Heterostructures

Journal of the American Chemical Society, 2023
Epitaxial heterostructures of two-dimensional (2D) halide perovskites offer a new platform for studying intriguing structural, optical, and electronic properties. However, difficulties with the stability of Pb- and Sn-based heterostructures have repeatedly slowed the progress.
Singh, Ajeet, Yuan, Biao, Rahman, Md. Habibur, Yang, Hanjun, De, Angana, Park, Jee Yung, Zhang, Shuchen, Huang, Libai, Mannodi-Kanakkithodi, Arun, Pennycook, Timothy J., Dou, Letian   +10 more
openaire   +3 more sources

Chemically Localized Resonant Excitons in Silver–Pnictogen Halide Double Perovskites [PDF]

The Journal of Physical Chemistry Letters, 2021
Halide double perovskites with alternating silver and pnictogen cations are an emerging family of photoabsorber materials with robust stability and band gaps in the visible range. However, the nature of optical excitations in these systems is not yet well understood, limiting their utility.
Raisa-Ioana Biega, Marina R. Filip, Linn Leppert, Jeffrey B. Neaton   +3 more
openaire   +6 more sources

Bandgap Engineering of Lead-Free Halide Double Perovskites

Proceedings of the 13th Conference on Hybrid and Organic Photovoltaics, 2021
Funding agencies: China Scholarship Council (CSC)
Fuxiang ji, Feng Gao, Weihua Ning, Feng Wang   +3 more
  +6 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

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

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

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

High-efficiency robust perovskite solar cells on ultrathin flexible substrates. [PDF]

, 2016
Wide applications of personal consumer electronics have triggered tremendous need for portable power sources featuring light-weight and mechanical flexibility. Perovskite solar cells offer a compelling combination of low-cost and high device performance.
Chen, Qi, Hong, Ziruo, Li, Gang, Li, Yaowen, Li, Yongfang, Meng, Lei, Xu, Guiying, Yang, Yang, Yang, Yang Michael, You, Jingbi   +9 more
core   +2 more sources

Highly Controllable Synthesis and DFT Calculations of Double/Triple-Halide CsPbX₃ (X = Cl, Br, I) Perovskite Quantum Dots: Application to Light-Emitting Diodes

Nanomaterials, 2019
Although all-inorganic CsPbX3 (X = Cl, Br, I) perovskite quantum dots (PQDs) have evoked exciting new opportunities for optoelectronic applications due to their remarkable optical properties, their emission color tunability has not been investigated to ...
Xinyue Lao, Xiyu Li, Hans Ågren, Guanying Chen   +3 more
doaj   +1 more source