Publication

Molecular engineering of panchromatic unsymmetrical squaraines for dye-sensitized solar cell applications

Michael Graetzel, Mohammad Khaja Nazeeruddin, Jinhyun Kim
2010
Journal Articles

Abstract

Three unsymmetrical squaraine dyes JK-64, JK-65, and JK-64Hx, containing a bulky spirobifluorene or hexyloxyphenyl unit are designed and synthesized. These sensitizers, when anchored onto a TiO2 surface, exhibit decreased aggregation as well as enhanced unidirectional flow of electrons. Under standard global AM 1.5 solar conditions, an optimized JK-64Hx sensitized cell gave a short-circuit photocurrent density (J(sc)) of 12.82 mA cm(-2), an open-circuit voltage (V-oc) of 0.54 V and a fill factor (ff) of 0.75, corresponding to an overall conversion efficiency (eta) of 5.20%.

Official source

https://infoscience.epfl.ch/entities/publication/880617b4-a900-4317-9cb4-bb8857356a61

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Michael Graetzel, Mohammad Khaja Nazeeruddin, Jinhyun Kim
2010
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/880617b4-a900-4317-9cb4-bb8857356a61

About this result

Related concepts (19)

Solar-cell efficiency

Solar-cell efficiency refers to the portion of energy in the form of sunlight that can be converted via photovoltaics into electricity by the solar cell. The efficiency of the solar cells used in a photovoltaic system, in combination with latitude and climate, determines the annual energy output of the system. For example, a solar panel with 20% efficiency and an area of 1 m2 will produce 200 kWh/yr at Standard Test Conditions if exposed to the Standard Test Condition solar irradiance value of 1000 W/m2 for 2.

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