An enhancement of 19.2% in PCE is obtained by incorporating silica-coated silver nanoparticles into the buffer layer of organic solar cells.

Sodium sulfinates, sulfinic acids, sulfonyl chlorides and sulfonyl hydrazides as readily available and efficient sulfonylation reagents have been extensively explored in recent years. Sulfonyl radical can be generated from these sulfonyl reagents via different methods, then the sulfonyl radical could react with various substrates via different pathways to afford the corresponding products. In this review, we will summarize the progress in sulfonylation via radical reaction using sodium sulfinates, sulfinic acids, sulfonyl chlorides and sulfonyl hydrazides in recent three years. In terms of the different sulfonylation reagents, we classify these sulfonylation reactions into four types: 1.

Flexible and lightweight photomultiplication-type organic photodetectors (PM-OPDs) have attracted wide attention for their broad application prospects, especially in the field of wearable electronic products. However, the commonly used indium tin oxide (ITO) conductive anode is not conducive to realize high-performance flexible PM-OPDs due to its rigidity and fragility. Here, on the flexible polyethylene terephthalate (PET) substrate, we successfully fabricate highly sensitive poly 3-hexylthiophene:phenyl-C 70 -butyric acid methyl ester (P3HT:PC 70 BM, 100:1) based PM-OPDs using ultra-thin silver films as transparent anodes. Specifically, a 1 nm thick MoO 3 layer is utilized as the wetting layer for facilitating the silver film percolation, and a 2 nm thick MoO 3 layer, as the hole transport layer, is coated on top of the ultra-thin silver film before coating the P3HT:PC 70 BM film. The as-prepared flexible PM-OPDs based on the ultra-thin silver film exhibit the optimal external quantum efficiency (EQE) and responsivity (R) of 1.3 × 10 5 % and 388.4 A W −1 , respectively, under −15 V bias, which are 1.98 times and 2.15 times greater than those of the ITO anode based device. More importantly, the device has good flexibility with the EQE maintaining 70.6% of its initial value after bending 10 times, and 51.4% of its initial value after bending 1000 times. This work paves the way for developing flexible PM-OPDs as well as other flexible optoelectronic devices.

No abstract