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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.


Top view SEM images of the SiNW etched with normal solution (a) and with diluted solution (b)
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Fig6: Top view SEM images of the SiNW etched with normal solution (a) and with diluted solution (b)

Mentions: Based on the analysis above, it is expected that the morphology of the silicon nanowire arrays will also affect the performance of the solar cell. The etchant consisting with another concentration of 2.5 M HF acid and 0.01 M AgNO3 was also used to fabricate SiNW. The hybrid solar cell with SiNW of L = 0.23 μm etched by the diluted solution were denoted by 2, which was compared with the hybrid solar cells with L = 0.23 μm (denoted by 1). Top view scanning electron microscope (SEM) analysis was employed to characterize the morphology of the silicon nanowire arrays etched with different concentration solutions, as shown in Fig. 6a, b. We can find that the silicon nanowire etched with diluted solution are disconnected with each other, but the silicon nanowire etched with high concentration solution is connected.Fig. 6


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)

Top view SEM images of the SiNW etched with normal solution (a) and with diluted solution (b)
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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

Fig6: Top view SEM images of the SiNW etched with normal solution (a) and with diluted solution (b)
Mentions: Based on the analysis above, it is expected that the morphology of the silicon nanowire arrays will also affect the performance of the solar cell. The etchant consisting with another concentration of 2.5 M HF acid and 0.01 M AgNO3 was also used to fabricate SiNW. The hybrid solar cell with SiNW of L = 0.23 μm etched by the diluted solution were denoted by 2, which was compared with the hybrid solar cells with L = 0.23 μm (denoted by 1). Top view scanning electron microscope (SEM) analysis was employed to characterize the morphology of the silicon nanowire arrays etched with different concentration solutions, as shown in Fig. 6a, b. We can find that the silicon nanowire etched with diluted solution are disconnected with each other, but the silicon nanowire etched with high concentration solution is connected.Fig. 6

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.