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Title: Light-trapping in perovskite solar cells

We numerically demonstrate enhanced light harvesting efficiency in both CH3NH3PbI3 and CH(NH2)2PbI3-based perovskite solar cells using inverted verticalcone photonic-crystal nanostructures. For CH3NH3PbI3 perovskite solar cells, the maximum achievable photocurrent density (MAPD) reaches 25.1 mA/cm2, corresponding to 92% of the total available photocurrent in the absorption range of 300 nm to 800 nm. Our cell shows 6% absorption enhancement compared to the Lambertian limit (23.7 mA/cm2) and has a projected power conversion efficiency of 12.9%. Excellent solar absorption is numerically demonstrated over a broad angular range from 0 to 60 degree for both S- and P- polarizations. For the corresponding CH(NH2)2PbI3 based perovskite solar cell, with absorption range of 300 nm to 850 nm, we find a MAPD of 29.1 mA/cm2, corresponding to 95.4% of the total available photocurrent. Furthermore, the projected power conversion efficiency of the CH(NH2)2PbI3 based photonic crystal solar cell is 23.4%, well above the current world record efficiency of 20.1%.
Authors:
 [1] ;  [2] ;  [3]
  1. Univ. of Toronto, Toronto, ON (Canada); A*STAR (Singapore)
  2. Univ. of Toronto, Toronto, ON (Canada); Beijing Univ. of Posts and Telecommunications, Beijing (China)
  3. Univ. of Toronto, Toronto, ON (Canada); Soochow Univ., Suzhou (China)
Publication Date:
Grant/Contract Number:
FG02-06ER46347
Type:
Published Article
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 6; Journal Issue: 6; Journal ID: ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)
Research Org:
Rensselaer Polytechnic Inst., Troy, NY (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; dielectric oxides; solar cells; photonic crystals; refractive index; absorption spectra
OSTI Identifier:
1255313
Alternate Identifier(s):
OSTI ID: 1306378