Abstract: A simulated sunlight generating device for generating a simulated sunlight required for evaluating performance of solar cells includes a plurality of driving units, a plurality of light-emitting units, and a plurality of adjusting units. The driving units drive the light-emitting units to emit light. The adjusting units enable the light of the light-emitting units to not only propagate along the same light route but also be added up and combined to form the simulated sunlight of an intended wavelength with ease of installation, ease of maintenance, low costs, high flexibility, and high efficiency.

Abstract: The present invention related to a lift-off structure adapted to a substrate having a photoelectric device, the structure comprising: a buffer layer, forming on the substrate; an upper sacrificial layer, forming on the buffer layer; an etch stop layer, forming on the upper sacrificial layer, and the photoelectric device structure forming on the etch stop layer.

Abstract: An inverted metamorphic (IMM) solar cell semiconductor structure for use of a laser lift-off (LLO) process using external laser is introduced. The IMM solar cell semiconductor structure includes a substrate layer, a sacrifice layer, a plurality of bandgap layers, and a handle layer. The sacrifice layer, formed on the substrate layer, is made of a material containing a III-V compound. The bandgap layers, formed on the sacrifice layer, are for producing movements of electronic holes according to an absorbed extrinsic light wavelength. The handle layer is formed on the bandgap layers. Laser penetrates the substrate layer to fall on the sacrifice layer, such that the bandgap layers are lifted off by the sacrifice layer, thereby resulting in a high-efficiency IMM solar cell. A LLO laser lift-off method for the IMM solar cell semiconductor is further provided.

Abstract: A simulated sunlight generating device for generating a simulated sunlight required for evaluating performance of solar cells includes a plurality of driving units, a plurality of light-emitting units, and a plurality of adjusting units. The driving units drive the light-emitting units to emit light. The adjusting units enable the light of the light-emitting units to not only propagate along the same light route but also be added up and combined to form the simulated sunlight of an intended wavelength with ease of installation, ease of maintenance, low costs, high flexibility, and high efficiency.

Abstract: The present invention related to a lift-off structure adapted to a substrate having a photoelectric device, the structure comprising: a buffer layer, forming on the substrate; an upper sacrificial layer, forming on the buffer layer; an etch stop layer, forming on the upper sacrificial layer, and the photoelectric device structure forming on the etch stop layer.

Abstract: The present disclosure provides a solar cell device. The device has solar cells having multijunction. A supplemental current source is connected with one of the solar cells having a smallest current in the device. Thus, through providing required current by the supplemental current source, usage performance of the device is enhanced.