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High‐Performance Semitransparent Ternary Organic Solar Cells

Journal Article · · Advanced Functional Materials
 [1];  [1];  [1];  [1];  [1];  [2];  [3];  [3];  [2];  [4];  [5]
  1. Heeger Beijing Research and Development Center School of Chemistry Beihang University Beijing 100191 China, Beijing Advanced Innovation Center for Biomedical Engneering Beihang University Beijing 100191 China
  2. State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an 710049 China
  3. Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry and Chinese Academy of Sciences Beijing 100190 China
  4. College of Chemistry/Jiangxi Provincial Key Laboratory of New Energy Chemistry Nanchang University Nanchang 330031 China
  5. Heeger Beijing Research and Development Center School of Chemistry Beihang University Beijing 100191 China
Abstract

Semitransparent organic solar cells (STOSCs) are ideal candidates for building‐integrated photovoltaics. Power conversion efficiency (PCE) is one of the most important parameters of STOSCs, which is typically limited by the intrinsic narrow absorption of thin active layer. Ternary structure is demonstrated as an efficient approach to broaden the light absorption and manipulate the morphology, thus leading to improved PCEs by introducing a third component into the binary system. However, STOSCs based on ternary systems are rarely studied. In this contribution, semitransparent ternary solar cells are fabricated using a wide‐bandgap ( E g = 2.10 eV) polymer donor, PBT1‐S, as the third component. It is found that the addition of a small amount of PBT1‐S to PTB7‐Th:PC 71 BM blend has a negligible influence on its average visible transmittance (AVT) and color perception. A PCE of 9.2% is achieved for the champion ternary device with 20% AVT, which is one of the highest values for STOSCs. The results indicate that ternary structure is a promising approach for the fabrication of high‐performance STOSCs.

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1438078
Journal Information:
Advanced Functional Materials, Journal Name: Advanced Functional Materials Journal Issue: 49 Vol. 28; ISSN 1616-301X
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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