## Part 1: Top Title and Overall Paradigm Position: At the top of the technology roadmap, centered. Content: Main Title: Text: Research Roadmap of Photodetectors Font Size: 28 points, bold. Subtitle/Research Paradigm: Text: "Calculation-Preparation-Construction-Design" Four-in-One Research Paradigm Font Size: 20 points, bold, font color is dark gray. Overall Timeline: Text: Draw a horizontal arrow across the entire diagram below the title. Labels: Label "Stage 1", "Stage 2", "Stage 3", "Stage 4" equidistantly above the arrow, and label virtual times such as "M1-M6", "M7-M12", etc. Arrow Style: 2 points thick, black. ## Part 2: Stage 1 - Calculation Position: Below "Stage 1" of the overall timeline. Structure: Divided into four layers vertically. Layer 1: Stage Title Bar Text: Stage 1: Theoretical Calculation and Mechanism Elucidation Font Size: 22 points, white, bold. Background: Dark blue rectangle, width equal to the stage content. Layer 2: Core Methods Text: [Core Methods] DFT | First Principles | Molecular Dynamics Font Size: 16 points, bold. Style: Light blue rounded rectangle, centered text. Layer 3: Research Content (three boxes in parallel) Box 1: Title: A-site Ion Substitution Content: A₄PbCl₆ Calculation Font Size: Title 14 points bold, content 12 points. Box 2: Title: B-site Ion Doping Content: Sb³⁺ Doping Font Size: Same as above. Box 3: Title: Theoretical Prediction Content: Dielectric Function; Absorption Spectrum Font Size: Same as above. Style: White box, thin black border, left-aligned layout. Layer 4: Stage Goals and Key Technologies Illustration Left Half - Stage Goal Box: Text: [Stage Goal] Reveal the intrinsic physical mechanism and establish a theoretical model of the "structure-property" relationship. Font Size: 15 points, white, bold. Style: Green rounded rectangle. Right Half - Key Technology/Theoretical Diagram Schematic Box: Title: Figure 1: Band Structure of A₄PbCl₆ System Content: [Place a virtual band diagram here, labeling band gap values Eg1, Eg2...]. Font Size: Figure title 12 points, virtual text in the figure 10 points. Style: Gray background box, slightly thicker border. ## Part 3: Stage 2 - Preparation Position: Immediately to the right of Stage 1, connected by the overall timeline arrow. Structure: Same as Stage 1, four layers vertically. Layer 1: Stage Title Bar Text: Stage 2: Controllable Synthesis Style: Same as before. Layer 2: Core Methods Text: [Core Methods] Modified Hot Injection Method | Re-precipitation Method | Ion Doping Style: Same as before. Layer 3: Research Content (3 boxes in parallel) Box 1: Quantum Dot Synthesis Box 2: Sb³⁺/Bi³⁺ Doped Modified Material Preparation Box 3: Structure and Spectroscopic Characterization (XRD, TEM, PL, UV-Vis), Style and Font Size: Same as Stage 1. Layer 4: Stage Goals and Key Technologies Illustration Left Half - Stage Goal Box: Text: [Stage Goal] Prepare high-purity chlorine-based nanomaterials to achieve precise band gap control. Right Half - Key Technology Illustration Box: Title: Figure 2: Process Flow Chart Content: [Virtual flow chart with steps such as "centrifugal purification"]. Style: Same as before.
1. Mix Design (or Experimental Materials) The mix design is ...