Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 6, Issue 1, Pages 599-605Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am405274z
Keywords
semitransparent; low-bandgap polymer solar cells; transmittance; reflectance; one-dimensional photonic crystals; distributed Bragg reflector
Funding
- National Natural Science Foundation of China [61275035, 61370046]
- Chinese National Programs for High Technology Research and Development (863 program) [2013AA030902]
- Doctoral Found of Ministry of Education of China [20110061130004]
- Project of Science and Technology Development Plan of Jilin Province [20110314, 20120324]
- Scientific Frontier and Interdiscipline Innovative Projects of Jilin University [2013ZY18]
- Foundation for Industrial Technology Research and Development Projects of Jiangmen City [2012-156-09]
- Natural Science Foundation of Guangdong Province, China [S2013010012854]
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Efficient semitransparent polymer solar cells (ST-PSCs) have been fabricated with one-dimensional photonic crystals (1DPCs) as a high reflector. The 1DPCs are composed of several pairs of WO3 (65.8 nm)/LiF (95.5 nm). By optimizing the pairs of WO3/LiF, 1DPCs can reflect the light back into the ST-PSCs due to the photonic band gap, when the high reflectance range of 1DPCs is matched with absorption spectrum of the active layer. ST-PSCs with 8 pairs of 1DPC exhibit an attractive performance. The short-circuit current density (J(sc)) and power conversion efficiency (PCE), respectively, reach to 9.76 mA/cm(2) and 5.16% compared to 8.12 mA/cm(2) and 4.24% of the reference ST-PSCs without 1DPCs. A maximum enhancement of 20.2% in J(sc) is obtained and the PCE increases by similar to 21.7%. This approach provides a simple, fascinating and promising method to realize the highly efficient ST-PSCs toward applications.
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