These separated electrons and holes pass through the CIGS layer and polymer layer,respectively. If the CIGS and polymer layers are thin enough, the separated electrons and holes
will arrive click here at the Al cathode and ITO anode with less recombination and larger short-circuit current density. Figure 5 J – V characteristics. Comparisons of the J-V characteristics between the conventional polymer solar cells and hybrid solar cells containing a CIGS interlayer. The photovoltaic properties of the above solar cells were measured under AM 1.5G irradiation at 100 mW/cm2. Conclusions The CIGS nanoparticles with sizes of 20 to 70 nm and a distribution density of about 7 × 109 cm-2 were deposited on the ITO-glass substrates by PLD. Such CIGS layers were introduced between P3HT:PCBM photoactive layer and ITO-glass substrates to enhance the light absorption of the P3HT:PCBM layer. The UV-visible-infrared absorption and PL spectroscopy measurements of the P3HT:PCBM photoactive layers with and without the CIGS interlayers suggest that the polymer chains are coiled on the CIGS nanoparticles, which enhance the light absorption and improve the efficiency of the exciton separation. The J-V curves demonstrate that the short-circuit current density of
the hybrid solar cells was improved compared with that of the conventional polymer solar cells. These results indicate that the CIGS interlayers composed of nanoparticles are potential to selleck enhance the light absorption of conjugated polymers and improve the photovoltaic performance of polymer solar cells. Authors’ information YZ, HL, XL, LG, and YL are graduate students major in fabrication of nanometer materials and optical devices. JS and ZY is an Milciclib mouse associate professor and MS-degree holder specializing in optics and optical devices. JW is a professor and PhD-degree holder
specializing in optics and nanometer materials. NX is a professor and PhD-degree holder specializing in nanometer materials and optical devices, especially expert in nanoscaled optoelectronic devices. Acknowledgements This work is supported by the National Basic Research Program of China (973 Program, Grant No. 2012CB934303) and the National Natural Science Foundation of China. References 1. Yu G, Gao J, Hummelen JC, Wudl F, Heeger AJ: Polymer photovoltaic cells: enhanced efficiencies via a network of internal donor-acceptor heterojunctions. Farnesyltransferase Science 1995,270(5243):1789–1791.CrossRef 2. Thompson BC, Frechet JMJ: Polymer-fullerene composite solar cells. Chem IntEd 2008,47(1):58–77. 3. Brabec CJ, Gowrisanker S, Halls JJM, Laird D, Jia SJ, Wliiams SP: Polymer-fullerene bulk-heterojunction solar cells. Adv Mater 2010,22(34):3839–3856.CrossRef 4. Huynh WU, Dittmer JJ, Alivisatos AP: Hybrid nanorod-polymer solar cells. Science 2002,295(5564):2425–2427.CrossRef 5. Chandrasekaran J, Nithyaprakash D, Ajjian KB, Maruthamuthu S, Manoh Aran D, Kumar S: Hybrid solar cell based on blending of organic and inorganic materials—an overview.