PATENT CLAIM ANALYSIS

Application Number: 15873135
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-08
Patent Classification: ["136", "255000"]

Abstract:
A four junction solar cell having an upper first solar subcell composed of a semiconductor material having a first band gap; a second solar subcell adjacent to said first solar subcell and composed of a semiconductor material having a second band gap smaller than the first band gap and being lattice matched with the upper first solar subcell; a third solar subcell adjacent to said second solar subcell and composed of a semiconductor material having a third band gap smaller than the second band gap and being lattice matched with the second solar subcell; and a fourth solar subcell adjacent to and lattice mismatched from said third solar subcell and composed of a semiconductor material having a fourth band gap smaller than the third band gap; wherein the fourth subcell has a direct bandgap of greater than 0.75 eV, and the average band gap of the solar cell is equal to or greater than 1.35 eV.

Claim (Index 13):
The four junction solar cell assembly as defined in  claim 1 , further comprising:\n a distributed Bragg reflector (DBR) layer adjacent to and beneath the third solar subcell and arranged so that light can enter and pass through the third solar subcell and at least a portion of which can be reflected back into the third solar subcell by the DBR layer, wherein the distributed Bragg reflector layer is composed of a plurality of alternating layers of lattice matched materials with discontinuities in their respective indices of refraction, wherein the difference in refractive indices between alternating layers is maximized in order to minimize the number of periods required to achieve a given reflectivity, and the thickness and refractive index of each period determines the stop band and its limiting wavelength, and wherein the DBR layer includes a first DBR layer composed of a plurality of p type In z Al x Ga 1-x-z As layers, and a second DBR layer disposed over the first DBR layer and composed of a plurality of p type In w Al y Ga 1-y-w As layers, where 0<w<1, 0<x<1, 0<y<1, 0<z<1 and y is greater than x; and an intermediate layer disposed between the DBR layer and the fourth solar subcell, wherein the intermediate layer is compositionally step-graded to lattice match the DBR layer on one side and the fourth solar subcell on the other side, and is composed of any of the As, P, N, Sb based III-V compound semiconductors subject to the constraints of having the in-plane lattice parameter greater than or equal to that of the DBR layer and less than or equal to that of the lower fourth solar subcell, and having a band gap energy greater than that of the fourth solar subcell.

Metadata:
- Claim Count in Document: 2.0
- Percentile: 86.0
- Lexical Diversity: 3.375
- Patent Class: 136.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15681144', '15249185', '15376195', '15250643', '15249204']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8483259119947427
- 35 USC 102 Novelty (BERT): 0.6332580038829768
- Combined Prediction Score: 0.8268191211835662
- Mean Citation Score: 577.12852
- Max Citation Score: 599.2646
- Similarity Product: 553.7651539510965

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test