Large-area flexible organic photovoltaic(OPV)modules are challenging to achieve high power conversion efficiency(PCE).Electrical shunts or shortages generally occur in large-area OPV modules due to the ultrathin(100-2...Large-area flexible organic photovoltaic(OPV)modules are challenging to achieve high power conversion efficiency(PCE).Electrical shunts or shortages generally occur in large-area OPV modules due to the ultrathin(100-200 nm)and soft active layers.Improving the surface smoothness of bottom transparent electrode will be able to suppress the shunts and shortages.In this work,we report a method to fabricate smooth and flexible transparent electrodes based on thin silver film,and further to fabricate efficient large-area flexible OPV modules.The fabricated thin silver transparent electrodes simultaneously have high conductivity,high optical transmittance,good mechanical flexibility and low surface roughness.Humidity exposure(h.e.)treatment on MoO_(3)effectively facilitates the continuous growth of the thin transparent silver electrode.6 nm silver film on MoO_(3)(h.e.)on plastic substrate shows a transmittance up to 89%,a sheet resistance of 15Ω/sq,and a low surface roughness with a rootmean-square value of 0.276 nm.Furthermore,52-cm^(2)flexible organic solar modules(15 subcells)showed a certified PCE of 12.66%.Furthermore,a 1350 cm^(2)flexible component assembled by 25 pieces of 52-55 cm^(2)modules showed certified PCE of 12.10%with an open-circuit voltage of 62.85 V.展开更多
基金supported by the National Natural Science Foundation of China (52273180,62104075,and 52425307)the Wuhan National Laboratory for Optoelectronics (WNLO)Funds for Innovation。
文摘Large-area flexible organic photovoltaic(OPV)modules are challenging to achieve high power conversion efficiency(PCE).Electrical shunts or shortages generally occur in large-area OPV modules due to the ultrathin(100-200 nm)and soft active layers.Improving the surface smoothness of bottom transparent electrode will be able to suppress the shunts and shortages.In this work,we report a method to fabricate smooth and flexible transparent electrodes based on thin silver film,and further to fabricate efficient large-area flexible OPV modules.The fabricated thin silver transparent electrodes simultaneously have high conductivity,high optical transmittance,good mechanical flexibility and low surface roughness.Humidity exposure(h.e.)treatment on MoO_(3)effectively facilitates the continuous growth of the thin transparent silver electrode.6 nm silver film on MoO_(3)(h.e.)on plastic substrate shows a transmittance up to 89%,a sheet resistance of 15Ω/sq,and a low surface roughness with a rootmean-square value of 0.276 nm.Furthermore,52-cm^(2)flexible organic solar modules(15 subcells)showed a certified PCE of 12.66%.Furthermore,a 1350 cm^(2)flexible component assembled by 25 pieces of 52-55 cm^(2)modules showed certified PCE of 12.10%with an open-circuit voltage of 62.85 V.
