奈米科技概論期中報告 Reporter: 王瑋 系級 : 成大工程科學所 學號 :N96964359

1. 奈米科技概論期中報告 Reporter:王瑋 系級:成大工程科學所 學號:N96964359

2. Low-temperature fabrication of dye-sensitized solar cells by transfer of composite porous layers nature materials vol 4 August 2005 MICHAEL DURR*, ANDREAS SCHMID,MARKUS OBERMAIER, SILVIA ROSSELLI, AKIO YASUDA, AND GABRIELE NELLES* Materials Science Laboratory, Sony Deutschland GmbH, 70327 Stuttgart, Germany

3. Outline • Introduction • Experimental • Result and discussion • Conclusion

4. Introduction • Dssc consisting of nanoporous TiO2 are some 10um thick , therefore in suited for flexible applications. • Flexible plastic substrates cannot withstand temperatures of up to 500℃ to sinter TiO2 nanoparticles. • But LT methods cannot compete as regards electrical properties with layers obtained with the standard high-temperature process. • It shows that by a lift-off technique, presintered porous layers can be transferred to a second substrate, and the original electrical properties of the transferred porous layers are maintained.

5. Experimental Au=10~20nm 0.5M I- and 0.05M I3- in γ-butyrolacton 10~20nm

6. Result and discussion Standard cell Lift-off

7. Result and discussion Advantages： 1.Nanorods ensure efficient light scattering and increased light absorption of dye molecules 2. The TiO2 nanorods were good electron transport 3. It is facilitated to removal and transfer of sphere-rod composite layers. Transfer layer SEM of TiO2 TEM of TiO2 nanorods

8. Result and discussion Jsc：14,8mAcm-2 Voc：760 mV FF：65% n=7.3% Time of Immersion in gold-dissolving electrolyte

9. Conclusion • The lift-off technique combines the advantage of high-temperature sintering, and good electrical properties of the porous layer, with the advantage of the compression method, that is, the possibility of application in processes or for substrates that require low temperatures.