عنوان مجله
|
Materials Research Express
|
چکیده
|
Absorption of near-infrared (NIR) photons of solar energy which includes the~40% of the sunlight
energy is an effective approach to improve the photovoltaic performance of solar cells. In the present
study, we have investigated PbS quantum dots (QDs) with different numbers of synthesis cycles (n)
were introduced to ZnO nanorods (ZNRs) bulk-heterojunction (BHJ) solar cells. Our analysis
revealed improving the power conversion efficiency (PCE) by absorbing the light in the visible and
near-infrared regions. The Light absorption of solar cells was enhanced by PbS QDs which led to an
increase in the photocurrent. With increasing (n), the PCE increases at first, then it decreases because
of the attenuation of possible facilitation of exciton dissociation. For this reason, the number of cycles
was optimized. As a result,byoptimizing the numbers of synthesis cycles (n), the PCE of PbSQD
sensitized ZNRbulk heterojunction solar cells were improved from 2.76% to 4.01% by 1.45 times.
|