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This paper discusses the V-grooved surface texturing in terms of geometrical optics and uses Fresnel's formula to calculate the reflectivity. We count all possible reflections of light paths for different angles of incidence as well as structure's various tilt angles before summing them up together in order to obtain the total reflectivity. We discuss two different light path conditions as follows:...
We demonstrate Al/Si NWs/poly(3,4-ethylenedioxy thiophene)/poly(styrenesulfonate)(PEDOT:PSS)/ITO hybrid solar cells. The lengths of these n-type Si NWs could be controlled by the etching time from 15min to 40min in an aqueous solution of AgNO3 and HF acid for this demonstration. The conductive polymer, PEDOT:PSS, was spin-coated on ITO glass. Before the PEDOT:PSS thin film dried, the top portion of...
A pair of solution-processed metal oxides is introduced near the electrodes to improve the inverted polymer solar cells. With the paired metal oxides, the conversion efficiency is notably enhanced to above 5%.
One approach to improve device stability is using polymer/ZnO nanorod hybrid solar cell. In our solar cell, the interface of ITO/PEDOT:PSS can be avoided by employing ZnO nanorod using a hydrothermal method and the low-work-function metal Al can be replaced by Ag. ZnO nanorod is used as an excellent electron selective layer and Ag has the nature of less air sensitivity.
The inverted bulk hetero-junction solar cell on the polyester (PET) substrate with a non-annealing active layer is investigated. Our investigations show that the easily processed inverted device with a non-annealing active layer on the indium-tin-oxide coated PET substrate exhibits a high power conversion efficiency of ~3.65%.
Correlation between the power conversion efficiency and dimethyl sulfoxide (DMSO) modified poly (3,4-ethylene dioxythiophene): poly(styrene sulfonate) (PEDOT:PSS) of polymer solar cells is studied. The PEDOT:PSS is modified by adding process additive (DMSO) during processing. However, highly conductive DMSO-PEDOT:PSS leads to tremendous errors in the measurement of the polymer solar cells. Our investigations...
The slow drying of the photoactive layer in polymer/ZnO nanorod hybrid solar cells is studied as a way to improve device performance. The power conversion efficiency can be further improved to 3.05% with an enhanced fill factor of 55% by slowing the spin coating rate of photoactive layer. With the slower spin coating rate, the films of photoactive layer are thicker, and the polymer chains have longer...
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