Study of organic hybrid silicon solar cells by applying silver nanowires for improving surface defects using for electric car (nghiên cứu tế bào pin mặt trời silicon hỗn hợp bằn

https //iaeme com/Home/journal/IJDMT 24 editor@iaeme com International Journal of Design and Manufacturing Technology (IJDMT) Volume 13, Issue 1, January December 2022, pp 24–27, Article ID IJDMT 13 0[.]

International Journal of Design and Manufacturing Technology (IJDMT)

Volume 13, Issue 1, January-December 2022, pp 24–27, Article ID: IJDMT_13_01_004

Available online at https://iaeme.com/Home/issue/IJDMT?Volume=13&Issue=1

ISSN Print: 0976 – 6995 and ISSN Online: 0976 – 7002

DOI: https://doi.org/10.17605/OSF.IO/UB

© IAEME Publication

STUDY OF ORGANIC HYBRID SILICON SOLAR CELLS BY APPLYING SILVER NANOWIRES FOR IMPROVING SURFACE DEFECTS USING

FOR ELECTRIC CAR

Khai Chu Thanh

Dong Nai Technology University, Vietnam

ABSTRACT

We propose methods of enhancing the efficiency of organic hybrid silicon solar cells The organic material has large absorption of light, so decreasing the cell efficiency To solve this problem, PEDOT:PSS is diluted using IPA before it is deposited Then, we use silver nanowires to improve the contact between PEDOT:PSS and the front electrode

Key words: Organic material, silicon nanoholes, dilution, silver nanowires, hybrid solar

cells

Cite this Article: Khai Chu Thanh, Study of Organic Hybrid Silicon Solar Cells by

Applying Silver Nanowires for Improving Surface Defects Using for Electric Car,

International Journal of Design and Manufacturing Technology (IJDMT), 13(1), 2022,

pp 24–27

https://iaeme.com/Home/issue/IJDMT?Volume=13&Issue=1

1 INTRODUCTION

Crystalline silicon solar cells still dominate the PV market recently because of their high efficiency, mature technology and supply of abundant material [1-4] However, one drawback

is that anti-reflection (AR) coating in vacuum Hybrid photovoltaic devices combining organic and inorganic materials are thus receiving excellent attention because of their low-cost fabrication and solution process The polymer poly (3, 4ethylenedioxythiophene): polystyrenesulfonate (PEDOT:PSS) is a widely used organic material for hybrid solar cell devices On the other hand, to improve device optical absorption and to replace conventional

AR coating, nanostructures, like nanoholes, are fabricated on silicon surface to form silicon nanostructure/organic hybrid solar cells Here, we choose the metal-assisted chemical etching (MacEtch) for silicon nanoholes fabrication [2-4] Furthermore, because PEDOT:PSS is an absorption organic material [5-8], we used lot of solvents, like IPA, mix with PEDOT:PSS It can assist us to reduce the PEDOT absorption and thickness Nonetheless, it cause another problems, the dilute PEDOT:PSS penetrated to silicon nanostructures easily It would make the carriers travel long distance and waste of energy Thus, we took silver nanowires (AgNWs) to

Study of Organic Hybrid Silicon Solar Cells by Applying Silver Nanowires for Improving Surface

Defects Using for Electric Car schematic diagram and travel distance is shown in Figure 1(a) and (b) Accordingly, we achieve efficient hybrid silicon solar cells with power conversion efficiency of 14.56%, Voc of 0.574 V,

Jsc of 35.55cmA/cm2 and FF of 71.37% [9-10]

Figure 1(a) The schematic diagram without AgNWs carriers travel distance (b) The schematic

diagram with AgNWs carriers travel distance

2 EXPERIMENT AND CHARACTERIZATION

660-μm thickness N-type (100) mono-crystalline silicon with resistivity of 2-4 ohm-cm2 was used First, the rear side silicon was spin-coated with dopant (SOD) and annealed, then put into high temperature furnace Afterwards, SiNHs were fabricated by two-step metal-assisted chemical etching The photoresist (S-1813) was spin-coated on rear side to protect backside The silicon wafers were immersed in MacEtch aqueous solution containing AgNO3 and HF for

5 seconds Then, the deposited silver wafer was immersed in an aqueous solution with HF and

H2O2 for 25 seconds The as-prepared SiNHs were soaked in dilute HNO3 to dissolve the silver dendrites Then the wafers were cleaned in acetone (ACE) to remove the photoresist, and then de-ionized water (DI water), piranha solution (H2SO4:H2O2) at 120oC Rear metal Aluminum (Al) of 100 nm was deposited successively on the rear side of silicon by thermal evaporation Afterwards, we selected PEDOT:PSS (PH1000:DMSO) to serve as our organic material and mix IPA to dilute PEDOT:PSS The PEDOT:PSS solution was spin-coated on SiNHs and annealed under 120oC for 10 minutes Then, spin-casted AgNWs on device and annealed under

120oC for 10 minutes Finally, Ag metal grid 100 nm was deposited on the front side by e-gun evaporator For J-V characteristic measurement, the device was illuminated under 1 sun AM 1.5 G 100mW/cm2 by solar simulator SUN 2000, Abet Technologies, Inc, and measured by Keithley 2400 source meter Scanning Electron Microscope (SEM) pictures of silicon nanostructures were observed by Hitachi S4800 FE-SEM Optical properties were measured by PerkinElmer Lambda 35 UV/Vis system with an integrating sphere

3 RESULTS AND DISCUSSION

The dilute PEDOT:PSS reduces the PEDOT:PSS absorption It is shown in Figure 2(a) and the SEM pictures of SiNHs coated different PEDOT:PSS are shown in Figure 2 (b)&(c) It is clearly shown that PEDOT:PSS (w/o dilution) dosen’t permeate in SiNHs and PEDOT:PSS (dilution) permeates in SiNHs It caused poor contact between SiNHs and electrode, and long distance shown in Figure 1 The J-V curve is show in Figure 2 (d)

Khai Chu Thanh

Figure 2(a) The absorption of different PEDOT:PSS in glass (b)&(c) The SEM of different

PEDOT:PSS coated on SiNHs (d)The J-V curve of dilute PEDOT:PSS

In other to enhance the contact, we use the spin-casting method to deposit silver nanowires and to improve contct of the PEDOT:PSS and electrode Ag Because the pure AgNWs has high reflection, we use dilutedAgNWs to fabricate the devices in this step The w/o dilute and dilute AgNWs reflections are shown in Figure 3(a) Figure 3(b) is the J-V curve of the device and parameters of the device are shown in Table 1

Figure 3(a) The reflection of different AgNWs and SiNHs (b) The J-V curve of different AgNWs

devices

Table 1 The parameter of devices

Sample with

dopant

J sc (mA/cm 2 ) V oc (V) PCE (%) FF (%) R s (Ω cm 2 ) R sh (Ω cm 2 )

Dilute 1 time -35.55 0.574 14.563 71.37 1.7514 3511.012

4 CONCLUSION

The SiNHs and dilute PEDOT:PSS can assist our device to absorb more light in silicon substrate However, in order to fabricate the device with SiNHs and diluted PEDOT:PSS, it will cause many surface defects Thus, we deposited AgNWs on PEDOT:PSS in our device AgNWs can modify surface, and then reduce surface defects In the end, it would improve the contact with PEDOT:PSS and the front electrode Therefore, SiNHs/PEDOT:PSS solar cells reach high PCE of 14.56% with high Jsc of 35.55 mA/cm2

Study of Organic Hybrid Silicon Solar Cells by Applying Silver Nanowires for Improving Surface

Defects Using for Electric Car

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