Preface<br>STRUCTURE AND PHYSICAL PROPERTIES OF METAL HALIDE PEROVSKITES<br>Crystal Structure of Perovskite Materials<br>Exciton Effects in Perovskite Materials<br>Size Effect of Perovskite Materials<br>Luminescence Properties of Perovskite Materials<br>Factors Influencing the Efficiency of Perovskite Light Emitting Diodes<br>Summary<br> <br>SYNTHESIS AND PREPARATION OF PEROVSKITE MATERIALS<br>Introduction<br>Perovskite Materials Structures<br>Preparation of Perovskite Nanomaterials<br>Processing Technology for Large-Area Perovskite Films<br>Conclusion and Outlook<br> <br>NEAR-INFRARED PEROVSKITE LIGHT-EMITTING DEVICES<br>Introduction<br>Progress in Near-Infrared Perovskite Luminescence Materials<br>Near-Infrared Perovskite Luminescent Materials<br>Strategies to Improve the Performance of NIR Perovskite Devices<br>Conclusion and Outlook<br> <br>PEROVSKITE RED LIGHT EMITTING MATERIALS AND DEVICES<br>The Development History of Perovskite Red Light Emitting Diodes<br>Red Emission Perovskite Materials<br>Perovskite Red Light Emitting Diodes<br>Conclusion and Outlook<br> <br><br>PEROVSKITE GREEN LIGHT EMITTING MATERIALS AND DEVICES<br>History of Green Perovskite Light Emitting Diodes<br>Green Light Perovskite Materials<br>Development of Green Perovskite Light Emitting <br>Factors Affecting the External Quantum Efficiency of Perovskite Green Light Emitting Diodes<br>Strategies for Improving the External Quantum Efficiency of Green Perovskite Light Emitting Diodes<br>Other Properties of Green Perovskite Light Emitting Diodes<br>Conclusion and Outlook<br> <br>BLUE PEROVSKITE LIGHT EMITTING MATERIALS AND DEVICES<br>Technology Development of Blue Perovskite Light Emitting Diodes<br>Blue-Shift Strategy<br>Perovskite Blue Light Emitting Materials<br>Process for the Preparation of Blue Light Emitting Layers<br>Device Performance Optimization and Interface Engineering<br>Optimization of Device Stability<br>Conclusion and Outlook<br> <br>EFFECT OF METAL ION DOPING ON PEROVSKITE LIGHT EMITTING MATERIALS<br>Metal Ion Doping Effect<br>Metal Ion Doped Materials and Devices<br>Metal Ion Doping Methods<br>Conclusion and Outlook<br> <br>NON-LEAD METAL HALIDE PEROVSKITE MATERIALS<br>Development History of Non-Lead Blue Perovskite Materials<br>Preparation of Non-Lead Metal Halide Materials<br>Types of Non-Lead Metal Halide Materials<br>Methods for Optimizing the Fluorescence Quantum Efficiency of Non-Lead Metal Halide Materials<br>Conclusion and Outlook<br> <br>PEROVSKITE WHITE LIGHT EMITTING MATERIALS AND DEVICES<br>Background of WPeLED<br>Down-Conversion Method<br>Full Electroluminescent PeLEDs<br>Single White Light Perovskite Materials and Self-Trapped Excitons<br>Perovskite-Organic Coupling White PeLEDs<br>Others<br>Conclusion and Outlook<br> <br>ELECTRON AND HOLE TRANSPORT MATERIALS<br>Introduction<br>Electron Transport Materials in PeLEDs<br>Hole Transport Materials in PeLEDs<br>Progress in the Study of Hole Transport Layers and Hole Injection Layers in Perovskite Light Emitting Diodes<br>Conclusion and Outlook<br> <br>STABILITY OF PEROVSKITE LIGHT EMITTING DIODES<br>Sources of Instability in Metal Halide Perovskites and Perovskite Light Emitting Diodes<br>Analysis of the Current Stability of Perovskite Light Emitting Diodes<br>Factors Affecting Efficiency Roll Off<br>Strategies for Dealing with Efficiency Roll Off<br>Conclusion and Outlook<br> <br>PEROVSKITE MATERIALS FOR LASER APPLICATIONS<br>Physics Principles of Laser<br>Perovskite Laser for Different Morphology<br>Conclusion and Outlook<br>