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The six-junction inverted metamorphic multi-junction (IMM6J) solar cell has been identified as a viable path towards air mass zero (AM0) conversion efficiencies in excess of 37% (1-sun, AM0, 28°C, 1353 mW/cm2). The design of the IMM6J device architecture is presented in this paper. Initial experimental results of the IMM6J are presented, including an experimental best AM0 conversion efficiency of...
The One-per-wafer denotes a single cell design for a large-area cell on a 100-mm diameter (4”) Ge wafer. As a result, the total area of this cell is on the order of ∼60cm2, which is twice as large as most conventional two-per-wafer solar cells. The silicon bypass diode design for the One-per-wafer cell has successfully passed electrical screening after forward bias, reverse bias and electrical cycling...
The inverted metamorphic multijunction (IMM) solar cell configuration allows significant increase of PV conversion efficiency over that of conventional InGaP/InGaAs/Ge triple junction (3J) devices. Recent activities have focused on tests of prototype IMM devices permanently mounted to a conductive substrate material. These devices exhibit no electrical or mechanical degradation after 750 thermal cycles...
Emcore is presently qualifying the fourth generation triple junction (3J) solar cell under the Air Force ManTech program. This cell referred to as the ZTJ, is designed to achieve 30% conversion efficiency under 1 sun AM0 illumination. In addition a companion cell with a monolithically integrated protection diode referred to as the ZTJM is under qualification at Emcore with a target AM0 efficiency...
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