Thermophotovoltaic (TPV) tandem converter technology is being explored in an effort to improve both the efficiency and power density of TPV systems. Inverted, tandem structures incorporate epitaxially grown 0.74-eV latticematched Gadn0.53As and 0.55-eV lattice-mismatched Gao.2alno.72As diodes. Adddionally, a strategy has been developed to allow voltage matching between these two subcells. Performance modeling calculations show that, under typical operating conditions, the 0.74/0.55eV tandem converter should outperform a 0.55-eV single junction converter by 15% on an efficiency basis and by 15% on a power density basis. This paper will present details regarding the design, growth, fabrication, and electrical, optical. and structural characterization of voltage-matched tandem TPV devices.