Author/Authors :
Song، نويسنده , , Q.L. and Li، نويسنده , , F.Y. and Yang، نويسنده , , H. and Wu، نويسنده , , H.R. and Wang، نويسنده , , X.Z. and Zhou، نويسنده , , W. and Zhao، نويسنده , , J.M. and Ding، نويسنده , , X.M. Henry Huang )، نويسنده , , C.H. and Hou، نويسنده , , X.Y.، نويسنده ,
Abstract :
A stable small-molecule organic photovoltaic device with structure of ITO⧹donor⧹acceptor⧹buffer⧹cathode is presented. A thin layer (∼60 Å) of tris-8-hydroxy-quinolinato aluminum (Alq3) instead of bathocuproine (BCP) is adopted as the buffer of the device, resulting in 150 times longer lifetime. The power conversion efficiency of the device is 2.11% under 75 mW/cm2 AM1.5G simulated illumination, and no perceptible efficiency degradation is observed for long-term storage of the device in vacuum or nitrogen-filled glove box. More effective blocking of Alq3 than BCP against diffusion of cathode atoms and permeation of oxygen and/or water molecules is considered as the main reason for the improved performance of the new device.
