Terpolymer receptor booster efficiency solar cells all together
Full polymers (All-polymersolar cells, all-PSCs) polymer based donor and acceptor polymer solar cells, its good thermal stability, high mechanical strength and stretchability of other unique advantages, suitable for wearable devices and flexible potential applications, however, the whole high-performance polymer battery performance behind a small molecule receptor device. The main reason is due to total all-polymer-polymer cell receptor is selectively less, more currently used are based on PDI and polymer NDI receptor, the presence of low absorption coefficient, miscibility with the polymer to form a difference , a strong degree of crystallinity, the polymer receptor and other shortcomings of poor electron mobility, has a negative effect both light current and fill factor (FF).
with a simple bridging unit PSMAs conjugated small molecule receptor (SMA) polymerized, having a broad absorption range, advantages of the strong absorbance of SMAs, which is a strategy preparation of polymer receptor species promising. LEE Fang team with this strategy, the modified thiophene small molecule receptor Y6 different molar amounts of 3-ethyl-thiophene (ET) polymerized units, a series of synthetic polymers receptor PTPBT-ETx. Compared with only y6 PTPBT unit and the thiophene unit, ET added units in the terpolymer PTPBT-ETx (where x is the molar ratio of units ET) exhibits a rising LUMO level, electron mobility and increase the polymer blends to improve blend film morphology PBDB-T thereof. And based PBDBT: PTPBT-ET0.3 solar cell to achieve full polymerization of more than 12.5% of the high power conversion efficiency (PCE), having a further long-term optical stability of more than 300 hours. The results show that, three yuan random small molecule receptor function unit and the third unit are all polymer copolymerized polymer in the development of efficient receptor a simple and effective strategy. In the paper entitled \”Strategy random terpolymer synthesized high performance solar cell having a whole polymer molecular receptor\” should be issued based on the well-known international journals Germany. This article is the corresponding author Lee Wing Fang Institute of Chinese Academy of Sciences Chemistry, Meng Lei researcher.