公开(公告)号：US11207731B2

公开(公告)日：2021-12-28

申请号：US16090697

申请日：2017-03-23

Applicant: First Solar, Inc.

Inventor： Shrinivas Govindarajan ,  Michael Latusek ,  Christopher Wagner ,  Feng Yan

IPC: B22F3/23 ,  C01G11/02 ,  C04B35/547 ,  C04B35/65 ,  C04B35/645 ,  C01B19/00 ,  C22C1/04 ,  B22F3/00 ,  B22F3/24 ,  B22F3/10 ,  B22F9/16

Abstract: A process for preparing alloy products is described using a self-sustaining or self-propagating SHS-type combustion process with point-source ignition, preferably a laser, in a pressurized vessel. Binary, ternary and quaternary alloys can be formed with control over polycrystalline structure and bandgap. Methods to tune the bandgap and the alloys formed are described. The alloy products may be doped. Preferably sulfides, tellurides or selenides are formed. Cooling during reaction takes place.

公开(公告)号：US10026855B2

公开(公告)日：2018-07-17

申请号：US15046887

申请日：2016-02-18

Applicant: First Solar, Inc.

Inventor： Shrinivas Govindarajan ,  Michael Latusek ,  Feng Yan

IPC: C01B19/00 ,  H01L31/00 ,  H01L31/0296

Abstract: A process for preparing alloy products powders is described using a self-sustaining or self-propagating SHS-type combustion process. Binary, ternary and quaternary alloy having cadmium, selenium and optionally a third element X or Y selected from Group VIA (such as S or Te) or from group IIB (such as Zn or Hg). The alloy products may be doped or not with a wide variety of other elements. The process involves heating to ignition, maintaining an elevated temperature less than melting for homogenization, followed by cooling and crushing. An optional de-oxidation process may follow to further purify the alloy and balance the stoichiometry.

公开(公告)号：US20170133522A1

公开(公告)日：2017-05-11

申请号：US15046887

申请日：2016-02-18

Applicant: First Solar, Inc.

Inventor： Shrinivas Govindarajan ,  Michael Latusek ,  Feng Yan

IPC: H01L31/0296 ,  C01B19/00

CPC classification number: H01L31/0296 ,  C01B19/002 ,  C01B19/007 ,  C01G11/006 ,  H01L31/0272

Abstract: A process for preparing alloy products powders is described using a self-sustaining or self-propagating SHS-type combustion process. Binary, ternary and quaternary alloy having cadmium, selenium and optionally a third element X or Y selected from Group VIA (such as S or Te) or from group IIB (such as Zn or Hg). The alloy products may be doped or not with a wide variety of other elements. The process involves heating to ignition, maintaining an elevated temperature less than melting for homogenization, followed by cooling and crushing. An optional de-oxidation process may follow to further purify the alloy and balance the stoichiometry.