Direct evidence for grain-boundary depletion in polycrystalline CdTe from nanoscale-resolved measurements

Visoly-Fisher, Iris; Cohen, Sidney R.; Cahen, David
January 2003
Applied Physics Letters;1/27/2003, Vol. 82 Issue 4, p556
Academic Journal
We use scanning probe microscopy-based methods for direct characterization of a single grain boundary and a single grain surface in solar cell-quality CdTe, deposited by closed-space vapor transport. We find that scanning capacitance microscopy can serve to study polycrystalline electronic materials, notwithstanding the strong topographical variations. In this way, we find a barrier for hole transport across grain boundaries, a conclusion supported by the much more topography-sensitive scanning kelvin probe microscopy, with some variation in barrier height between different boundaries.


Related Articles

  • Characteristics Cd0.3Sn0.7Se thin films as absorber materials for Solar cell devices. SHABAN, Salma Mahdi; SALEH, Raad Mohammad; AHMED, Ahmed Saleh // Turkish Journal of Physics;2011, Vol. 35 Issue 2, p189 

    Cadmium Tin Selenide compound Cd0.3 Sn0.7 Se was prepared by direct reaction of high-purity elemental Cadmium, Tin and selenium. Cd0.3 Sn0.7 Se thin films were prepared on to well-cleaned glass substrates by vacuum thermal evaporation technique at room temperature of different thicknesses. The...

  • Photomemory in CdTe thin-film solar cells. Voronkov, �. N.; Sharonov, A. E.; Kolobaev, V. V. // Semiconductors;Apr99, Vol. 33 Issue 4, p461 

    It is shown that a change in the chemisorption equilibrium on the crystallite boundaries in thinfilm photoconverters based on polycrystalline CdTe occurs when they are subjected to radiation. This leads to the appearance of photomemory as a result of a change in the surface potential and a...

  • Electronic behaviour of thin-film CdTe solar cells. Burgelman, M.; Nollet, P.; Degrave, S. // Applied Physics A: Materials Science & Processing;1999, Vol. 69 Issue 2, p149 

    Abstract. New support is given for one of the controversial models about the electronic consequences of the CDC1[sub 2] treatment of a thin-film CdTe solar cell: the assumption that deep acceptor states are introduced in the bulk of the CdTe layer as a result of the CDCl[sub 2] treatment. A...

  • Improvement of CdTe solar cell performance with discharge control during film deposition by... Wendt, R.; Fischer, A.; Grecu, D.; Compaan, D. // Journal of Applied Physics;9/1/1998, Vol. 84 Issue 5, p2920 

    Focuses on cadium compound thin films and solar cells. Use of rf and dc excitation to control the plasma density during deposition; Attributes of the lower plasma density; Performace of the solar cells.

  • Oxygen doping in close-spaced-sublimed CdTe thin films for photovoltaic cells. Hsu, T. M.; Jih, R. J.; Lin, P. C.; Ueng, H. Y.; Hsu, Y. J.; Hwang, H. L. // Journal of Applied Physics;5/15/1986, Vol. 59 Issue 10, p3607 

    Focuses on cadmium-tellurium (CdTe)/cadmium-sulfur thin film solar cells. Example of a typical wavelength modulation reflectance spectrum of CdTe thin film with and without oxygen doping; Relationship between the fundamental and impurity transitions and the oxygen concentration in the CdTe thin...

  • Cathodoluminescence of Cu diffusion in CdTe thin films for CdTe/CdS solar cells. Romero, Manuel J.; Albin, David S.; Al-Jassim, Mowafak M.; Wu, Xuanzhi; Moutinho, Helio R.; Dhere, Ramesh G. // Applied Physics Letters;10/14/2002, Vol. 81 Issue 16, p2962 

    We investigate the distribution of Cu acceptor states in CdTe thin films used in high-efficiency solar cells. These states are CUed and Cu[sup +, sub i - V[sup -, sub Cd] complexes, which are relatively deep and shallow acceptors, respectively. Cathodoluminescence spectroscopy and imaging show...

  • Scanning photoelectron microscopy study of the laser-induced transformations of polycrystalline CdTe films. Nelson, Art J.; Danailov, M. // Journal of Applied Physics;4/1/2000, Vol. 87 Issue 7, p3520 

    Presents information on a study which examined the laser-induced transformations of polycrystalline cadmium telluride (CdTe) thin films. Surface cleaning of the CdTe thin films; Experimental details; Results and discussion; Conclusions.

  • Transparent CdZnSO thin films with tailored d spacings. Qiu, S. N.; Qiu, C. X.; Shih, I. // Journal of Applied Physics;4/15/1988, Vol. 63 Issue 8, p2787 

    Investigates the properties of polycrystalline CdZnSO thin films prepared by sputtering. Energy gap of ZnO; Experimental results; Crystalline quality of the films; Conclusions.

  • Effect of grain size and dislocation density on the performance of thin film polycrystalline silicon solar cells. Imaizumi, Mitsuru; Ito, Tadashi; Yamaguchi, Masafumi; Kaneko, Kyojiro // Journal of Applied Physics;6/1/1997, Vol. 81 Issue 11, p7635 

    Three kinds of important properties of the solar cell were calculated: short-circuit current density, open-circuit voltage, and conversion efficiency. Two equations which show the relationship between the minority-carrier diffusion length and the grain size or the etch pit density were used for...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics