Flexible dye-sensitized solar cells using binder free TiO2 paste for low temperature sintering are developed. In this paste a small amount of titanium gel is added to a paste of TiO2 nanoparticle. Analysis of titanium gel paste prepared at 150 ℃ shows that it has a pure anatase phase in XRD and mesoporous structure in SEM. The formation of the titanium gel 1- 2 nm coated layer is confirmed by comparing the TEM image analysis of the titanium gel paste and the pristine paste. This coating layer improves the excited electron transfer and electrical contact between particles. The J-V curves of the organic binder DSSCs fabricated at 150℃ shows a current density of 0.12 mA/cm2 and an open-circuit voltage of 0.47 V, while the titanium gel DSSCs improves electrical characteristics to 5.04 mA/cm2 and 0.74 V. As a result, the photoelectric conversion efficiency of the organic binder DSSC prepared at low temperature is as low as 0.02 %, but the titanium gel paste DSSCs has a measured effciency of 2.76%.

Abstracts
 1. 서 론
 2. 실험 방법
 3. 결과 및 고찰
 4. 결 론
 References

• 지승환(단국대학교 에너지공학과) | Seung Hwan Ji (Department of Energy Engineering, Dankook University)
• 박현수(단국대학교 에너지공학과) | Hyunsu Park (Department of Energy Engineering, Dankook University)
• 김도연(단국대학교 에너지공학과) | Doyeon Kim (Department of Energy Engineering, Dankook University)
• 한도형(단국대학교 에너지공학과) | Do Hyung Han (Department of Energy Engineering, Dankook University)
• 윤혜원(단국대학교 에너지공학과) | Hye Won Yun (Department of Energy Engineering, Dankook University)
• 김우병(단국대학교 에너지공학과) | Woo-Byoung Kim (Department of Energy Engineering, Dankook University) Corresponding author