| 1 | Self-doped n-type small molecular electron transport materials for high-performance organic solar cells显示文摘Two naphthalene diimide(NDI) and perylene diimide(PDI) based n-type water/alcohol soluble small molecules(NFN and PFP)are designed and utilized as electron transport layers(ETLs) for organic solar cells(OSCs). NFN and PFP are synthesized by using Sonogashira coupling from alkynyl modified fluorene with mono-bromo substituted NDI and PDI. Density functional theory study results of NFN and PFP show that they possess excellent planarity due to the employment of triple bonds as connection units.Moreover, it was shown by electron paramagnetic resonance study that both NFN and PFP possess obvious self-doping behaviors,which may effectively enhance their charge transporting capability as ETLs in OSCs. Power conversion efficiencies of 8.59% and9.80% can be achieved for OSCs with NFN and PFP as ETLs, respectively. The higher power conversion efficiency(PCE) of PFP based photovoltaic device is originated from the stronger doping property and higher mobility of PFP. | jinju liu nannan zheng zhicheng hu zhenfeng wang xiye yang fei huang yong cao | 2017 | Science China Chemistry2017，60，8： | 1 |
| 2 | Stretchable transparent electrodes for conformable wearable organic photovoltaic devices显示文摘To achieve adhesive and conformable wearable electronics,improving stretchable transparent electrode(STE)becomes an indispensable bottleneck needed to be addressed.Here,we adopt a nonuniform Young’s modulus structure with silver nanowire(AgNW)and fabricate a STE layer.This layer possesses transparency of>88%over a wide spectrum range of 400–1000 nm,sheet resistance below 20Ωsq^(−1),stretchability of up to 100%,enhanced mechanical robustness,low surface roughness,and good interfacial wettability for solution process.As a result of all these properties,the STE enables the fabrication of a highly efficient ultraflexible wearable device comprising of both organic photovoltaic(OPV)and organic photodetector(OPD)parts with high mechanical durability and conformability,for energy-harvesting and biomedical-sensing applications,respectively.This demonstrates the great potential of the integration of OPVs and OPDs,capable of harvesting energy independently for biomedical applications,paving the way to a future of independent conformable wearable OPV/OPDs for different applications. | Nan Cui Yu Song Ching-Hong Tan Kai Zhang Xiye Yang Sheng Dong Boming Xie Fei Huang | 2021 | npj Flexible Electronics2021，5，1： | 1 |
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