Abstract: The invention relates to a back-side contact solar cell including a semiconductor substrate, in particular a silicon wafer, including a front side and a back side, the solar cell having electrodes of a first polarity and electrodes of a second polarity on the back side, wherein a tunnel layer and a highly doped silicon layer are positioned under the electrodes of a first polarity, and the electrodes of the second polarity make direct electrical and mechanical contact with the semiconductor substrate.

Abstract: A back-contact solar cell and a method for producing the same are disclosed. The solar cell back side includes first, second and third areas. The first areas are on pedestal-like elevations, each having first and second conducting layers and a first tunneling layer between the first conducting layer and the semiconductor substrate. The first and second conducting layers are each amorphous, polycrystalline or partially crystalline. Each second area has the second conducting layer and a second tunneling layer between the second conducting layer and the semiconductor substrate. The third areas do not contain amorphous, polycrystalline or partially crystalline silicon. A first dielectric layer or stack including first and second interruptions respectively in the first and second areas at least partially covers the back side. First and second electrodes respectively contact the first and second conducting layers in the first and second areas through corresponding first and second interruptions.

Abstract: A climate control system for a vehicle for combustible coolants and is a device for installation on a vehicle roof. A directly evaporating system includes an electrical switch box inside a climate control device for the vehicle and is partitioned so that, in the event of relevant leakages of assemblies containing coolant, the assembly cannot come into contact with the combustible coolant and no ignitable mixture can occur in these areas. The electrical box is a closed assembly and is operatively connected to an assembly by which air from areas outside the segments containing coolant is guided into the electrical box.

Abstract: An air-conditioning system for a vehicle suitable for flammable refrigerants of categories A2, A2L, and A3 is provided. The system is a compact piece of equipment for installation on a vehicle roof and has equipment sections for air treatment and a compressor-liquefier unit, and optionally an outgoing air, an electrical switchbox, and/or silencer. The system is a direct evaporating system in which the air to be conditioned for a passenger area is sealed off within the air-conditioning system such that, in the event of leaks at refrigerant-conducting assemblies, ingress of flammable refrigerant into the interior of the vehicle is prevented. The refrigerant-conducting assemblies and components are located outside the areas where comfort air is conducted, in a separate housing and open to the surroundings.

Abstract: The invention relates to a method for producing a back-contact solar cell (10), and to a back-contact solar cell (10) comprising a semiconductor substrate (12), in particular a silicon wafer, comprising a front side (16) and a back side (14), the solar cell (10) comprising electrodes (36) of a first polarity and electrodes (38) of a second polarity on the back side, characterized in that that the electrodes (36) of the first polarity are located on a highly doped silicon layer (20) of the first polarity, the highly doped silicon layer (20) being located on a first passivation layer (18) located on the semiconductor substrate, and the electrodes (38) of the second polarity directly electrically and mechanically contacting the semiconductor substrate (12) via highly doped base regions (30) of the second polarity of the semiconductor substrate (12).

Abstract: The invention relates to a back-side contact solar cell including a semiconductor substrate, in particular a silicon wafer, including a front side and a back side, the solar cell having electrodes of a first polarity and electrodes of a second polarity on the back side, wherein a tunnel layer and a highly doped silicon layer are positioned under the electrodes of a first polarity, and the electrodes of the second polarity make direct electrical and mechanical contact with the semiconductor substrate.

Abstract: A climate control system for a vehicle is suitable for combustible coolants and is a compact device for installation on a vehicle roof. A directly evaporating system includes an electrical switch box inside a compact climate control device for the vehicle and is partitioned so that, in the event of relevant leakages of assemblies containing coolant, the assembly cannot come into contact with the combustible coolant and no ignitable mixture can occur in these areas. The electrical box is a closed assembly and is operatively connected to an assembly by which air from areas outside the segments containing coolant is guided into the electrical box in such a way that a positive pressure is created in the electrical box to prevent combustible coolant from flowing into the electrical box.

Abstract: An air-conditioning system for a vehicle suitable for flammable refrigerants of categories A2, A2L, and A3 is provided. The system is a compact piece of equipment for installation on a vehicle roof and has equipment sections for air treatment and a compressor-liquefier unit, and optionally an outgoing air, an electrical switchbox, and/or silencer. The system is a direct evaporating system in which the air to be conditioned for a passenger area is sealed off within the air-conditioning system such that, in the event of leaks at refrigerant-conducting assemblies, ingress of flammable refrigerant into the interior of the vehicle is prevented. The refrigerant-conducting assemblies and components are located outside the areas where comfort air is conducted, in a separate housing and open to the surroundings.

Abstract: A heat exchanger for flammable refrigerants has a housing in which refrigerant lines are situated. The housing is provided with fins on the inside of a closed side face, and at least a portion of the outside of the closed side face can be brought into operative connection with a passenger compartment of a vehicle. The housing is designed as a module which can be partitioned off from the passenger compartment in a gas-tight manner, where only permanently sealed sections of the refrigerant lines are situated in the interior of the housing, the connection points of which refrigerant lines are each situated completely outside the housing. The housing has sealing frame and/or sealing plates such that the connections of the refrigerant lines are sealed off from the passenger compartment and are ventilated outward to the surroundings.

Abstract: A back surface contact solar cell has a wafer with an anti-reflection layer on the front surface, with an emitter and a back surface field on the back surface, and with contacts, produced using laser ablation, on the back surface, wherein the pitch is at most 800 micrometers. Furthermore provided is a method for producing such a solar cell.