The product, High Quality P3HT/Poly(3 - hexylthiophene - 2,5 - diyl) with CAS number 104934 - 50 - 1, is a well - known conjugated polymer. Its chemical formula is (C₁₂H₁₆S)ₙ. This polymer has excellent electrical and optical properties due to its conjugated backbone structure.
It usually appears as a dark - colored solid. The molecular weight can vary depending on the specific synthesis process, typically ranging from a few thousand to tens of thousands of Daltons. The high - quality version of this product ensures a relatively narrow molecular weight distribution, which is crucial for its performance in various applications. It is soluble in common organic solvents such as chloroform, toluene, and dichloromethane, which provides convenience for processing.
1. Organic Photovoltaic Cells: P3HT is one of the most commonly used electron - donor materials in organic solar cells. When combined with an appropriate electron - acceptor material, it forms a bulk heterojunction structure. The absorption spectrum of P3HT can cover a part of the visible light range, enabling it to efficiently convert sunlight into electricity.
2. Field - Effect Transistors: In organic field - effect transistors (OFETs), P3HT can be used as the active semiconductor layer. Its charge - carrier mobility allows for the efficient transport of charges between the source and drain electrodes, making it a key material for flexible and low - cost electronic devices.
3. Sensors: The electrical properties of P3HT are sensitive to the presence of certain analytes. It can be used in chemical and biological sensors to detect gases, biomolecules, and other substances through changes in conductivity or optical properties.
1. Solution Preparation: First, dissolve the P3HT in a suitable organic solvent at an appropriate concentration. The choice of solvent and concentration depends on the specific application. For example, in the preparation of organic solar cells, a concentration of around 10 - 20 mg/mL in chloroform is commonly used. Stir the solution gently at room temperature or with mild heating until the polymer is fully dissolved.
2. Film Deposition: There are several methods for depositing P3HT films, such as spin - coating, drop - casting, and ink - jet printing. Spin - coating is a widely used technique. Place a small amount of the P3HT solution on a clean substrate and spin the substrate at a high speed to form a thin and uniform film. The spinning speed and time need to be optimized according to the desired film thickness.
3. Annealing: After film deposition, annealing is often required to improve the crystallinity and molecular packing of P3HT, which can enhance its electrical and optical properties. The annealing temperature and time depend on the specific product and application requirements, typically ranging from 100 - 150°C for 10 - 30 minutes.
1. Organic Solar Cell Application: A research group prepared organic solar cells using P3HT as the donor material and [6,6] - phenyl - C61 - butyric acid methyl ester (PCBM) as the acceptor. They first dissolved P3HT in chloroform at a concentration of 15 mg/mL and PCBM in the same solvent at an appropriate ratio. After spin - coating the P3HT:PCBM blend on an indium tin oxide (ITO) substrate, they annealed the device at 130°C for 20 minutes. The resulting solar cell showed a power conversion efficiency of up to 4%, which is a relatively high value for simple organic solar cell structures.
2. OFET Application: A company developed flexible OFETs using P3HT as the active layer. They used a simple solution - processing method to deposit the P3HT film on a plastic substrate. By optimizing the film - forming conditions and device structure, the OFETs exhibited a charge - carrier mobility of 0.1 cm²/Vs, which is sufficient for many low - power electronic applications such as flexible displays and wearable sensors.
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