An air stable ITO-free nonfullerene organic solar cell with very high power conversion efficiency is achieved by using microcavity based device architecture with PBDB-T-SF:IT-4F BHJ layer less than 100 nm. The microcavity device could strongly enhance light absorption in PBDB-T-SF:IT-4F BHJ layer and decrease reflection rate of overall device. the microcavity device with single BHJ layer has an 10% improvement in J_sc and 10.8% enhancement in PCE comparing with ITO based device leading to a high PCE of 14.02%. Especially, the Ag/Au composite electrode decreases layer thickness and improves light transmittion. The TeO₂/MoO₃ composite optical capping layer enhances air stability with equal low reflectance using single TeO₂ layer. As a result, This device construction benefits for designing strong light absorption, air stable and high PCE OSC devices with nonfullerene acceptor based thin BHJ layer.

通过使用具有小于100 nm的PBDB-T-SF：IT-4F BHJ层的基于微腔的器件架构，可以实现具有非常高的功率转换效率的空气稳定的无ITO非富勒烯有机太阳能电池。该微腔器件可以极大地增强PBDB-T-SF：IT-4F BHJ层中的光吸收，并降低整个器件的反射率。与基于ITO的设备相比，具有单BHJ层的微腔设备的J _sc提高10％，PCE提高10.8％，从而导致PCE达到14.02％。特别地，Ag / Au复合电极减小层厚度并改善光透射。使用单一的TeO ₂，TeO ₂ / MoO ₃复合光学覆盖层可提高空气稳定性，并具有相同的低反射率层。结果，该器件构造有益于设计具有基于非富勒烯受体的薄BHJ层的强光吸收性，空气稳定性和高PCE OSC器件。