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Substantial Improvement of Short Wavelength Response in n-SiNW/PEDOT:PSS Solar Cell.

Ge Z, Xu L, Cao Y, Wu T, Song H, Ma Z, Xu J, Chen K - Nanoscale Res Lett (2015)

Bottom Line: We fabricated more isolated silicon nanowires with the diluted etching solution.And the J sc of the hybrid solar cell with more isolated nanowires has a significant enhancement, from 30.1 to 33.2 mA/cm(2).The remarkable EQE in the wavelength region of 300 and 600 nm was also obtained, which are in excess of 80 %.

View Article: PubMed Central - PubMed

Affiliation: School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures of National Laboratory of Solid State Microstructures, Nanjing University, Nanjing, 210093, People's Republic of China.

ABSTRACT
We report herein on the effects of silicon nanowire with different morphology on the device performance of n-SiNW/PEDOT:PSS hybrid solar cells. The power conversion efficiency (PCE) and external quantum efficiency (EQE) of the SiNW/PEDOT:PSS hybrid solar cells can be optimized by varying the length of the silicon nanowires. The optimal length of silicon nanowires is 0.23 μm, and the hybrid solar cell with the optimal length has the V oc of 569 mV, J sc of 30.1 mA/cm(2), and PCE of 9.3 %. We fabricated more isolated silicon nanowires with the diluted etching solution. And the J sc of the hybrid solar cell with more isolated nanowires has a significant enhancement, from 30.1 to 33.2 mA/cm(2). The remarkable EQE in the wavelength region of 300 and 600 nm was also obtained, which are in excess of 80 %. Our work provides a simple method to substantially improve the EQE of hybrid solar cell in the short wavelength region.

No MeSH data available.


a The EQE of the hybrid solar cells with different L and b corresponding integration EQE over different wavelength range varies with the length of SiNW
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Fig3: a The EQE of the hybrid solar cells with different L and b corresponding integration EQE over different wavelength range varies with the length of SiNW

Mentions: The EQE, which is the percentage of electrons collected per incident photon, can be used as a measure of the efficiency of charge transport given that the following quantities are comparable for a set of devices: (i) incident light intensity; (ii) fraction of light absorbed; (iii) charge collection efficiency at the electrodes; and (iv) the charge transfer efficiency [17]. In order to further study the mechanism of the change of Jsc, the EQE of the hybrid solar cells was measured and shown in Fig. 3a. The EQE decreases with the increase of the nanowire length in the short wavelength region (300–500 nm) but increases continuously as the length of silicon nanowires increase in the long wavelength region of 500–1100 nm. To obtain a more intuitive picture of the trend of EQE, we integrate the EQE over different wavelength ranges (shown in Fig. 3b). The optimal length for highest EQE is 0.23 μm.Fig. 3


Substantial Improvement of Short Wavelength Response in n-SiNW/PEDOT:PSS Solar Cell.

Ge Z, Xu L, Cao Y, Wu T, Song H, Ma Z, Xu J, Chen K - Nanoscale Res Lett (2015)

a The EQE of the hybrid solar cells with different L and b corresponding integration EQE over different wavelength range varies with the length of SiNW
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4539312&req=5

Fig3: a The EQE of the hybrid solar cells with different L and b corresponding integration EQE over different wavelength range varies with the length of SiNW
Mentions: The EQE, which is the percentage of electrons collected per incident photon, can be used as a measure of the efficiency of charge transport given that the following quantities are comparable for a set of devices: (i) incident light intensity; (ii) fraction of light absorbed; (iii) charge collection efficiency at the electrodes; and (iv) the charge transfer efficiency [17]. In order to further study the mechanism of the change of Jsc, the EQE of the hybrid solar cells was measured and shown in Fig. 3a. The EQE decreases with the increase of the nanowire length in the short wavelength region (300–500 nm) but increases continuously as the length of silicon nanowires increase in the long wavelength region of 500–1100 nm. To obtain a more intuitive picture of the trend of EQE, we integrate the EQE over different wavelength ranges (shown in Fig. 3b). The optimal length for highest EQE is 0.23 μm.Fig. 3

Bottom Line: We fabricated more isolated silicon nanowires with the diluted etching solution.And the J sc of the hybrid solar cell with more isolated nanowires has a significant enhancement, from 30.1 to 33.2 mA/cm(2).The remarkable EQE in the wavelength region of 300 and 600 nm was also obtained, which are in excess of 80 %.

View Article: PubMed Central - PubMed

Affiliation: School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures of National Laboratory of Solid State Microstructures, Nanjing University, Nanjing, 210093, People's Republic of China.

ABSTRACT
We report herein on the effects of silicon nanowire with different morphology on the device performance of n-SiNW/PEDOT:PSS hybrid solar cells. The power conversion efficiency (PCE) and external quantum efficiency (EQE) of the SiNW/PEDOT:PSS hybrid solar cells can be optimized by varying the length of the silicon nanowires. The optimal length of silicon nanowires is 0.23 μm, and the hybrid solar cell with the optimal length has the V oc of 569 mV, J sc of 30.1 mA/cm(2), and PCE of 9.3 %. We fabricated more isolated silicon nanowires with the diluted etching solution. And the J sc of the hybrid solar cell with more isolated nanowires has a significant enhancement, from 30.1 to 33.2 mA/cm(2). The remarkable EQE in the wavelength region of 300 and 600 nm was also obtained, which are in excess of 80 %. Our work provides a simple method to substantially improve the EQE of hybrid solar cell in the short wavelength region.

No MeSH data available.