Electrolyte electroreflectance spectroscopy

Hutton and Peter (1993) in a study of G2li xA xAs compared the bandgap values derived from photocurrent and photovoltage spectra with those derived by electrolyte electroreflectance spectroscopy (EER). They concluded that EER gives the most reliable results, provided that the doping density is not too high. 

Hutton R. S. and Peter L. M. (1993), Characterization of n-Ga xAlxAs (x < 0.3) epitaxial layers by photocurrent, photovoltage and electrolyte electroreflectance spectroscopies . Semiconductor Sci. Technol. 8, 1309-1316. 

Hutton R. S., Peter L. M., Batchelor R. A. and Hamnett A. (1994), The potential distribution across the semicondnctor-electrolyte interface—a stndy by electrolyte electroreflectance spectroscopy of GaAs and Gai AbAs nnder conditions of photodissolution , J. Electroanal. Chem. 375, 193-201. 

Duffy NW, Peter LM, Wang RL, Lane DW, Rogers KD (2000) Electrodeposition and characterisation of CdTe films for solar ceU applications. Electrochim Acta 45 3355-3365 Duffy NW, Peter LM, Wang RL (2002) Characterisation of CdS/CdTe heterojunctions by photocurrent spectroscopy and electrolyte electroreflectance/absorbance spectroscopy (EEA/EER). J Electroanal Chem 532 207-214 (see also references therein). 

A cost effective experimental setup for optical modulettion experiments, recently built in our laboratory. Is shown in Fig. 8 (57). Similar setup was recently reported by Tian et al. (58). Experiments performed with this system include photoreflectance (PR), electrolyte electroreflectance (EER), surface photovoltage spectroscopy (SPV), 1st. and 2nd. harmonics photoinduced current-voltage characteristics, spectral response and d.c. current-voltage characteristics. One can switch electronically between experiments and perform any number of techniques without moving the cell or removing the electrode from the electrolyte. A variable neutral... 

Electrolyte contacts have been used to characterize as-deposited and annealed CdS/CdTe solar cell structures by photocurrent spectroscopy and electrolyte elec-troabsorbance/electroreflectance measurements (EEA/EER) [267-269]. 

---