# US 11,309,445 B2 · Thin-film photovoltaic cell series structure and preparation process of thin-film photovoltaic cell series structure

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- Number: US 11,309,445 B2
- Document ID: US11309445B2
- Status: Granted
- Kind: B2
- Application number: 16/770,954
- Filed: 2019-06-03
- Published: 2021-03-11
- Granted: 2022-04-19
- Earliest claimed: 2019-05-31
- Assignees: Truwin Opto-Electronics Limited
- Applicants: Truwin Opto-Electronics Limited
- Inventors: Bin Sui; Weicang Zhang; Yun Zhao; Yuan Li; Wenjin Zhang; Liang Yang
- Web page: https://patentgrep.com/patent/US11309445B2

## CPC

- H10F 19/35: Structures for the connecting of adjacent photovoltaic cells, e.g. interconnections or insulating spacers
- H10F 19/37: comprising means for obtaining partial light transmission through the integrated devices, or the assemblies of multiple devices, e.g. partially transparent thin-film photovoltaic modules for windows
- H10F 71/103: {including only Group IV materials}
- H10F 71/121: {The active layers comprising only Group IV materials}
- H10F 77/211: {for photovoltaic cells}
- H10F 77/219: {Arrangements for electrodes of back-contact photovoltaic cells}
- Y02E 10/547: Monocrystalline silicon PV cells
- Y02E 10/548: Amorphous silicon PV cells
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A thin-film photovoltaic cell series structure is disposed on a display surface side of a display module and includes a transparent substrate, as well as a first single-junction cell and a second single-junction cell which are disposed on the transparent substrate and connected in series. The first single-junction cell includes a first front electrode, a first photovoltaic layer, and a first back electrode which are sequentially laminated and disposed on the transparent substrate, the second single-junction cell includes a second front electrode, a second photovoltaic layer, and a second back electrode which are sequentially laminated and disposed on the transparent substrate, and the first front electrode and the second back electrode are electrically connected through a metal auxiliary electrode to realize series connection of the first single-junction cell and the second single-junction cell.

## Claims

### Claim 1

A thin-film photovoltaic cell series structure, that is disposed on a display surface side of a display module, characterized in that the thin-film photovoltaic cell series structure comprises a transparent substrate, as well as a first single-junction cell and a second single-junction cell which are disposed on the transparent substrate and connected in series, wherein the first single-junction cell comprises a first front electrode, a first photovoltaic layer, and a first back electrode which are sequentially laminated and disposed on the transparent substrate, the second single-junction cell comprises a second front electrode, a second photovoltaic layer, and a second back electrode which are sequentially laminated and disposed on the transparent substrate, the first front electrode and the second back electrode are electrically connected through a metal auxiliary electrode to realize series connection of the first single-junction cell and the second single-junction cell,
the metal auxiliary electrode comprises a first metal auxiliary electrode and a second metal auxiliary electrode,
a total gate electrode connecting the first front electrode and the second front electrode is further formed on a periphery of the thin-film photovoltaic cell series structure, the first photovoltaic layer and the first back electrode are covered and insulated by an insulating layer, and
the first metal auxiliary electrode is also contact-connected on the first front electrode, and the first metal auxiliary electrode leads out the first front electrode through a via hole to form a positive electrode and extends to cover the insulating layer.

### Claim 2 (depends on 1)

The thin-film photovoltaic cell series structure according to claim 1, characterized in that the second metal auxiliary electrode is further disposed on the second back electrode, and the second metal auxiliary electrode extends as a negative electrode and is in contact connection with the first metal auxiliary electrode used as a positive electrode of the first single-junction cell to realize the series connection of the first single-junction cell and the second single-junction cell.

### Claim 3 (depends on 1)

The thin-film photovoltaic cell series structure according to claim 1, characterized in that the second metal auxiliary electrode is further disposed on the second back electrode, and the second metal auxiliary electrode extends as a negative electrode and is in contact connection with the first metal auxiliary electrode of the first single-junction cell to realize the series connection of the first single-junction cell and the second single-junction cell.

### Claim 4 (depends on 1)

The thin-film photovoltaic cell series structure according to claim 1, characterized in that the metal auxiliary electrode further comprises a third metal auxiliary electrode, the third metal auxiliary electrode is further included in the first single-junction cell, the third metal auxiliary electrode is in contact with the first front electrode, and the third metal auxiliary electrode is insulated and spaced apart from the first back electrode.

### Claim 5 (depends on 1)

The thin-film photovoltaic cell series structure according to claim 1, characterized in that the metal auxiliary electrode further comprises a third metal auxiliary electrode, the third metal auxiliary electrode is further included in the second single-junction cell, the third metal auxiliary electrode is in contact with the second front electrode, and the third metal auxiliary electrode is insulated and spaced apart from the second back electrode.

### Claim 6 (depends on 2)

The thin-film photovoltaic cell series structure according to claim 2, characterized in that the metal auxiliary electrode further comprises a third metal auxiliary electrode, the third metal auxiliary electrode is further included in the first single-junction cell, the third metal auxiliary electrode is in contact with the first front electrode, and the third metal auxiliary electrode is insulated and spaced apart from the first back electrode.

### Claim 7 (depends on 3)

The thin-film photovoltaic cell series structure according to claim 3, characterized in that the metal auxiliary electrode further comprises a third metal auxiliary electrode, the third metal auxiliary electrode is further included in the first single-junction cell, the third metal auxiliary electrode is in contact with the first front electrode, and the third metal auxiliary electrode is insulated and spaced apart from the first back electrode.

### Claim 8 (depends on 2)

The thin-film photovoltaic cell series structure according to claim 2, characterized in that the metal auxiliary electrode further comprises a third metal auxiliary electrode, the third metal auxiliary electrode is further included in the second single-junction cell, the third metal auxiliary electrode is in contact with the second front electrode, and the third metal auxiliary electrode is insulated and spaced apart from the second back electrode.

### Claim 9 (depends on 3)

The thin-film photovoltaic cell series structure according to claim 3, characterized in that the metal auxiliary electrode further comprises a third metal auxiliary electrode, the third metal auxiliary electrode is further included in the second single-junction cell, the third metal auxiliary electrode is in contact with the second front electrode, and the third metal auxiliary electrode is insulated and spaced apart from the second back electrode.