The theme of energy and environment permeates every second of our modern life. Lying at the heart is the design and development of new materials as well as the understanding of their physics and chemistry. Condensed matter materials, such as organic-inorganic hybrid perovskites, antiperovskite superionic conductors, metal-organic frameworks, covalent organic frameworks, black phosphorus, penta-graphene, and mechanoluminescent materials, have attracted tremendous interest in research. In this special issue, we intend to cover recent theoretical and experimental progress in the condensed matter materials that have applications related to energy and environment, also with a much broader touch on other important functionality.

The focus will be on the physical properties of novel condensed matter materials in terms of their applications, for example, in solar cells, rechargeable batteries based on metal ions, green-house gas sequestration and conversion, gas sensory and separation, photovoltaics, photoluminescence, and mechanical sensors.

Potential topics include but are not limited to the following:

• Dynamics of organic-inorganic hybrid perovskites and their applications in environment
• Electromagnetism of novel Li/Na electrolytes and their applications in energy conversion
• Novel condensed matter materials as electrode
• Quantum mechanics of novel metal-organic and covalent organic frameworks and their applications in photovoltaics
• Novel condensed matter photovoltaic and photoluminescent materials
• Materials with exotic mechanical properties, such as negative thermal expansion and negative Poisson's ratio, and their application in green-house gas sequestration