A series of isomeric alicyclic-functionalized polyimide with chemical imidization and thermal imidization (CPI-x and TPI-x) were prepared from a rigid alicyclic-functionalized isomerism diamine, 5(6)-amino-1-(4-aminophenyl)-1,3,3-trimethylindane (DAPI). The influences of incorporation of the isomeric rigid alicyclic structure onto the backbone of the polymers were systematically investigated in terms of optical, thermal, mechanical, dielectric and surface properties, respectively. Due to the moderate chemical imidization condition, CPI-x series retain higher glass transition temperature (Tg) in the range of 329–429 °C than the Tg of TPI-x (from 321.9 °C to 370.7 °C). Therefore, the CPI-1 film based 5-DAPI was chosen as the flexible substrate. MoO₃ was chosen as the interface layer to improve the compatibility between PI substrate and the metal electrode. Then a ultra-thin layer of MoO₃ (3 nm)/Au(2 nm)/Ag(4 nm) was utilized to be the transparent electrode. After annealing at 220 °C for 0.5 h, zinc oxide (ZnO) was deposited onto the electrode to maintain the superior electron mobility and improve the transparency of the electrode. Consequently, the flexible quantum dots light emitting diode (QLED) obtained a high luminance of 5230 (cd/m²) and EQE of 5.2%, meanwhile, a device performance of 4.36% was achieved in organic photovoltaic (OPV) devices.

从刚性脂环族官能化异构二胺5（6）-氨基-1-（4-氨基苯基）-1制备了一系列具有化学酰亚胺化和热酰亚胺化的异构体脂环族官能化聚酰亚胺（CPI-x和TPI-x） ，3,3-三甲基茚满（DAPI）。分别从光学，热学，机械，介电和表面性质方面，系统地研究了异构体刚性脂环结构并入聚合物主链的影响。由于中等的化学酰亚胺化条件，CPI-x系列在329–429°C的范围内保持了比TPI-x的Tg（321.9°C至370.7°C）更高的玻璃化转变温度（Tg）。因此，选择了基于CPI-1薄膜的5-DAPI作为柔性基板。MoO ₃为了改善PI衬底与金属电极之间的相容性，选择了Al 2 O 3作为界面层。然后，将MoO ₃（3nm）/ Au（2nm）/ Ag（4nm）的超薄层用作透明电极。在220°C下退火0.5小时后，氧化锌（ZnO）沉积在电极上，以保持优异的电子迁移率并提高电极的透明度。因此，柔性量子点发光二极管（QLED）获得了5230（cd / m ²）的高亮度和5.2％的EQE，同时，在有机光伏（OPV）器件中获得了4.36％的器件性能。