公开(公告)号：US10141469B1

公开(公告)日：2018-11-27

申请号：US15692541

申请日：2017-08-31

Applicant: STC.UNM

Inventor： Francesca Cavallo ,  Vijay Saradhi Mangu

IPC: H01L31/18 ,  H01L31/0725 ,  H01L31/0352 ,  H01L31/0392 ,  H01L31/032 ,  H01L31/0224 ,  H01L31/054 ,  H01L31/0236

Abstract: A solar cell for collecting solar radiation can include a barrier layer such as a dielectric barrier layer and a heterostructure including a first light absorbing layer and at least a second light absorbing layer. A method for forming the solar cell can include forming a sacrificial layer on a support substrate and forming the barrier layer on the sacrificial layer. The barrier layer is formed to have a strain gradient through its thickness. The heterostructure is attached to the barrier layer and the sacrificial layer is removed, thereby separating the barrier layer and the heterostructure from the support substrate. During the removal of the sacrificial layer, the strain gradient causes the barrier layer and heterostructure, to roll, curl, or spiral, thereby resulting in a radially stacked heterostructure that provides a light concentrating optical cavity having multiple light absorbing layers with different band gaps.

公开(公告)号：US10680129B1

公开(公告)日：2020-06-09

申请号：US16153277

申请日：2018-10-05

Applicant: STC.UNM

Inventor： Francesca Cavallo ,  Vijay Saradhi Mangu

IPC: H01L31/0236 ,  H01L31/0352 ,  H01L31/0725 ,  H01L31/032 ,  H01L31/0224 ,  H01L31/054 ,  H01L31/0392

Abstract: A solar cell for collecting solar radiation can include a barrier layer such as a dielectric barrier layer and a heterostructure including a first light absorbing layer and at least a second light absorbing layer. A method for forming the solar cell can include forming a sacrificial layer on a support substrate and forming the barrier layer on the sacrificial layer. The barrier layer is formed to have a strain gradient through its thickness. The heterostructure is attached to the barrier layer and the sacrificial layer is removed, thereby separating the barrier layer and the heterostructure from the support substrate. During the removal of the sacrificial layer, the strain gradient causes the barrier layer and heterostructure, to roll, curl, or spiral, thereby resulting in a radially stacked heterostructure that provides a light concentrating optical cavity having multiple light absorbing layers with different band gaps.