State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences , Changchun 130033, China.
University of Chinese Academy of Sciences , Beijing 100049, China.
ACS Appl Mater Interfaces. 2015 Sep 16;7(36):19960-5. doi: 10.1021/acsami.5b04509. Epub 2015 Sep 4.
A low-work-function, indium tin oxide (ITO)-free transparent cathode having a tin oxide (SnOX)/Ag/SnOX/bismuth oxide (Bi2O3) (SASB) structure is developed without using annealing treatment. This represents the first time that Bi2O3 has been introduced to lower the work function of transparent electrodes. The SASB transparent cathode exhibits excellent photoelectric properties with a maximum transmittance of ∼88%, a low sheet resistance of ∼9.0 Ω·sq(-1), and a suitable work function of 4.22 eV that matches the lowest unoccupied molecular orbital level of the acceptor for exacting electrons efficiently. The power conversion efficiency of the polymer solar cell with the SASB electrode is 6.21%, which is comparable to that of ITO-based devices. The results indicate that SASB is a good alternative to ITO as transparent cathodes in optoelectronic devices.
一种低功函数、无铟锡氧化物（ITO）的透明阴极，具有氧化锡（SnOX）/银/氧化锡（SnOX）/氧化铋（Bi2O3）（SASB）结构，无需退火处理。这代表了首次将 Bi2O3 引入以降低透明电极的功函数。SASB 透明阴极表现出优异的光电性能，最大透过率约为 88%，低方阻约为 9.0 Ω·sq(-1)，以及合适的 4.22 eV 的功函数，与受体的最低未占据分子轨道能级相匹配，从而有效地接收电子。具有 SASB 电极的聚合物太阳能电池的功率转换效率为 6.21%，与基于 ITO 的器件相当。结果表明，SASB 是光电设备中 ITO 作为透明阴极的良好替代品。
