High Efficiency Organic Tandem Solar Cells With GO and ZnO Buffer Layers

摘要

One approach to harvest a wide solar spectral solar energy is to stack two solar cells with different absorption characteristics in tandem cell architecture.Herein,solution processed tandem solar cells,in which highly transparent and conducting polymer hole transport materials as an efficient intermediate electrode were designed,fabricated,and characterized.An interconnect layer serves as an electron transport and collecting layer for the front cell.The tandem solar cells showed a high open circuit voltage (Voc) 1.62 V,a moderate short circuit current density (Jsc) 7.11 mA/cm2,filling factor (FF) 74.63 ％,leading to the power conversion efficiency of 8.40 ％.The obtained Voc value of tandem solar cell is very close to the summation of Voc attained from front and rear cells,and it is evident that our tandem solar cell are well connected in series.