Global Patent Index - EP 2412008 A1

EP 2412008 A1 20120201 - METHOD FOR PRODUCING SOLAR CELLS HAVING SELECTIVE EMITTER

Title (en)

METHOD FOR PRODUCING SOLAR CELLS HAVING SELECTIVE EMITTER

Title (de)

VERFAHREN ZUR HERSTELLUNG VON SOLARZELLEN MIT SELEKTIVEM EMITTER

Title (fr)

PROCÉDÉ DE FABRICATION DE CELLULES SOLAIRES À ÉMETTEUR SÉLECTIF

Publication

EP 2412008 A1 20120201 (DE)

Application

EP 10711215 A 20100326

Priority

  • EP 2010053985 W 20100326
  • DE 102009015367 A 20090327
  • DE 102009041546 A 20090915

Abstract (en)

[origin: WO2010115730A1] The invention relates to a method for producing solar cells having a selective emitter. Wafers (1) having no saw damage are first provided. A full-surface application of a doping source (2) to the wafer and a light, first inward diffusion of the dopant are then carried out until a first film resistor region is obtained. The applied doping source is then structured, wherein only those regions (4) remain as a result of the structuring that substantially correspond to the sections on the wafer to be contacted later. Another, second diffusion from the remaining regions of the doping source into the wafer volume is then carried out until a second film resistor region for the selective emitter (4) and a simultaneous redistribution of the dopant (5) introduced during the first diffusion are obtained, having the goal of lowering the dopant concentration in the region near the surface that is no longer covered by the doping source, under the condition that the film resistor values of the first film resistor region are larger than those of the second film resistor region.

IPC 8 full level

H01L 21/225 (2006.01); H01L 31/068 (2012.01); H01L 31/18 (2006.01)

CPC (source: EP US)

H01L 21/2255 (2013.01 - EP US); H01L 31/068 (2013.01 - EP US); H01L 31/1804 (2013.01 - EP US); Y02E 10/547 (2013.01 - EP US); Y02P 70/50 (2015.11 - EP US)

Citation (search report)

See references of WO 2010115730A1

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

DOCDB simple family (publication)

DE 102009041546 A1 20101014; CN 102449738 A 20120509; CN 102449738 B 20150902; EP 2412008 A1 20120201; US 2012167968 A1 20120705; WO 2010115730 A1 20101014

DOCDB simple family (application)

DE 102009041546 A 20090915; CN 201080023029 A 20100326; EP 10711215 A 20100326; EP 2010053985 W 20100326; US 201013259835 A 20100326