2,2',7,7'-tetra(N, N-di-tolyl)aMino-spiro-bifluor

_1. 

_{High charge carrier mobility: Spiro-TTB has a very high charge carrier mobility, which means that in electronic devices, charges can be transferred more quickly in the material, thereby improving the electron transport efficiency of the device.}

_2. 

_{Remarkable luminous effect: Spiro-TTB shows high fluorescence efficiency and luminous brightness, making it a very effective fluorescent material. This makes Spiro-TTB widely used in organic light-emitting diodes (OLeds) and other devices.}

_3. 

_{Good thermal stability: Spiro-TTB shows good thermal stability and can maintain its electrical and optical properties under high temperature conditions, which is very important for many electronic devices.}

_{4. 。}

_{Wide-band gap characteristics: Spiro-TTB has a wide photoelectric band gap, which enables it to absorb and emit different wavelengths of light. This makes Spiro-TTB suitable for a wide range of applications in photoelectric conversion devices, such as solar cells and photodetectors.}

5. 

_{Easy synthesis and processing: Spiro-TTB has a relatively simple synthesis method, and can be prepared into a thin film form by solution processing technology. This makes Spiro-TTB easy to process and handle during device preparation.}