| 학회 | 한국공업화학회 |
| 학술대회 | 2010년 봄 (05/13 ~ 05/14, BEXCO(부산)) |
| 권호 | 14권 1호 |
| 발표분야 | Solar Cell |
| 제목 | Spectroscopic Study on Primary processes in Dye-sensitized Solar Cells |
| 초록 | We have so far studied primary process in dye-sensitized solar cells through wide-wavelength-range (400-2500 nm), highly sensitive transient absorption spectroscopy [1]. Figure 1 shows the principle of transient absorption measurements for DSSC. Since electron injection process is a key process to realize high performance in DSSC, we have mainly studied electron injection process in dye-sensitized nanocrystalline semiconductor films. We estimated the absolute value of electron injection quantum yield inj [2] and studied the effect of sensitizer dyes [3], semiconductors [4] and excitation wavelength [5]. We also examined the effect of the additives, 4-tert-butylpyridine (tBP) and Li ion, which are known to markedly improve the performance of solar cell devices [6,7,8]. Recently, we have used alternative technique for studying electron injection process, time-resolved microwave conductivity (TRMC) [9,10]. In this technique, microwave intensity change (-P/P) is proportional to (number of electron) x (mobility) and therefore not only the efficiency of electron injection, but also trapping dynamics of electron in TiO2 films can be studied. Using the technique, we studied particle size dependence of the efficiency of electron injection [9] and interparticle transfer of electrons through the temperature dependence of TRMC signals [10]. References [1] Katoh, R. et al., Cood. Chem. Rev. 248 (2004) 1195. [2] Yoshihara, T. et al., J. Phys. Chem. B 108 (2004) 2643. [3] Katoh, R. et al., J. Phys. Chem. B 106 (2002) 12957. [4] Katoh, R. et al., J. Phys. Chem. B 108 (2004) 4818. [5] Katoh, R. et al., C. R. Chimie, 9 (2006) 639. [6] Katoh, R. et al., J. Mater. Chem. 17 (2007) 3190. [7] Katoh, R. et al., J. Phys. Chem. C 2009, 113: 20738. [8] Katoh, R. et al., Chem. Phys. Lett, 2010, 489: 202. [9] Katoh, R. et al., J. Phys. Chem. C, 2007, 111: 10741. [10] Savenije, T. et al. Chem. Phys. Lett. 2007, 461, 93. |
| 저자 | Ryuzi Katoh |
| 소속 | AIST |
| 키워드 | Solar Cell |
