 
 <prompt> "The visuals are created through? Given the previous question, write a context that contains the answer. It can be 1 - 20 sentences. Context:" 

Translate am to Nigerian Pidgin. If programming code dey inside, leave am as e be. Don't add any extra statement for your response: <response>: ```Di structure of QD-LEDs wey dem use for di electrical-excitation scheme dey similar to di basic design of OLEDs. A layer of quantum dots dey sandwiched between layers of electron-transporting and hole-transporting materials. An applied electric field dey cause electrons and holes to move enter di quantum dot layer and recombine forming an exciton wey go excite a QD. Dis scheme dey commonly studied for quantum dot display. Di ability to change emission wavelengths and di narrow bandwidth dey also useful as excitation sources for fluorescence imaging. Fluorescence near-field scanning optical microscopy (NSOM) wey dey utilize an integrated QD-LED don already dey demonstrated.``` 