Enhanced Performance of Carbon Quantum Dots Based Organic Solar Cells

Organic polymer solar cells (OSCs) have become research hotspot due to its low price, flexible preparation, solution preparation, translucency and so on in recently years. Adding quantum dots to an organic solar active layer to prepare a ternary structure becomes a promising approach. Here, we embedded carbon quantum dots into active layers to ameliorate the PCE of organic solar cells. The results of electron microscopy show that the CQDS are spherical and the average particle size is below 10 nm. Absorption spectra (ABS) of pure film layer and CQDs added film demonstrates that the active layer embedded with CQDs has better absorption strength than the active layer without CQDs added. The FF of carbon quantum dot-added device is 34%, the JSC is 15.2 mA/cm2, the VOC is 0.55 V, and the PCE reached 2.81%.