Optical properties and dynamic process in metal ions doped on CdSe quantum dots sensitized solar cells

Ha Thanh Tung; Dang Huu Phuc

doi:10.3788/COL201816.072501

Chinese Optics Letters, Volume. 16, Issue 7, 072501(2018)

Optical properties and dynamic process in metal ions doped on CdSe quantum dots sensitized solar cells

Ha Thanh Tung¹ and Dang Huu Phuc^2,3、*

Author Affiliations

¹Institute of Research and Development, Duy Tan University, Da Nang, Vietnam

²Theoretical Physics Research Group, Advanced Institute of Materials Science, Ton Duc Thang University, Ho Chi Minh City, Vietnam

³Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam

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Figures & Tables(8)

Fig. 1. (a), (d) FE-SEM image at 100 nm, (b), (e) cross-section at 1 μm, and (c), (f) EDX pattern of co-sensitized $CdS / CdSe : {Mn}^{2 +}$ (or ${Cu}^{2 +}$ ). (g), (h) XRD patterns of co-sensitized $CdS / CdSe : {Mn}^{2 +}$ (or ${Cu}^{2 +}$ ) QDSSCs.

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Fig. 2. (a) UV-Vis spectra and (b) ${(α h ν)}^{2}$ vs (hν) curves of the pure CdS/CdSe and co-sensitized $CdS / CdSe : {Mn}^{2 +}$ (or ${Cu}^{2 +}$ ) QDSSCs.

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Fig. 3. (a) PL decays and (b) photocurrent density–voltage (J-V) curves of the pure CdS/CdSe and co-sensitized $CdS / CdSe : {Mn}^{2 +}$ (or ${Cu}^{2 +}$ ) QDSSCs.

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Fig. 4. (a) Schematic diagram for the band alignment in ${TiO}_{2} / CdS / CdSe : X$ ( ${Mn}^{2 +}$ or ${Cu}^{2 +}$ ) QDSSCs and (b) Nyquist curves of pure CdSe and CdSe:X-QDSSCs.

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Table 1. Composition of ${TiO}_{2} / CdS / CdSe : {Cu}^{2 +} / ZnS$
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Table 1. Composition of ${TiO}_{2} / CdS / CdSe : {Cu}^{2 +} / ZnS$
Elements Energy (keV) Mass fraction (%) Atom fraction (%)
C K 0.277 5.09 24.37
O K 0.525 0.77 2.78
S K 2.307 8.25 14.78
Ti K 4.508 13.85 16.62
Cu K 8.040 0.45 0.41
Zn K 8.630 0.66 0.58
Se L 1.379 19.39 14.11
Cd L 3.133 51.53 26.35

Table 2. Composition of ${TiO}_{2} / CdS / CdSe : {Mn}^{2 +} / ZnS$
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Table 2. Composition of ${TiO}_{2} / CdS / CdSe : {Mn}^{2 +} / ZnS$
Elements Energy (keV) Mass fraction (%) Atom fraction (%)
C K 0.277 1.00 4.31
O K 0.525 1.82 5.91
Na K 1.041 1.07 2.42
Al K 1.486 1.10 2.13
Si K 1.739 0.83 1.54
S K 2.307 7.38 11.96
Ti K 4.508 50.71 55.04
Cd L 3.133 36.09 16.69

Table 3. $E_{g}$ , CB, and VB Positions of the Co-sensitized $CdS / CdSe : {Mn}^{2 +}$ (or ${Cu}^{2 +}$ ) Calculated by the Tauc equation and UV-Vis Spectra
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Table 3. $E_{g}$ , CB, and VB Positions of the Co-sensitized $CdS / CdSe : {Mn}^{2 +}$ (or ${Cu}^{2 +}$ ) Calculated by the Tauc equation and UV-Vis Spectra
Materials $E_{g}$ (eV) X(eV) E_CB(eV) E_VB(eV)
Pure CdSe 2.03 5.102 $- 4.08$ $- 6.11$
$CdSe : {Mn}^{2 +}$ (20%) 1.75 4.620 $- 3.74$ $- 5.49$
$CdSe : {Cu}^{2 +}$ (0.3%) 1.73 4.913 $- 4.05$ $- 5.78$

Table 4. Values of J-V Curves and Electrochemical Impedance Spectra of the Pure CdS/CdSe and Co-sensitized $CdS / CdSe : {Mn}^{2 +}$ (or ${Cu}^{2 +}$ ) QDSSCs

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Table 4. Values of J-V Curves and Electrochemical Impedance Spectra of the Pure CdS/CdSe and Co-sensitized $CdS / CdSe : {Mn}^{2 +}$ (or ${Cu}^{2 +}$ ) QDSSCs

Anodes	$J_{SC}$ ( $mA / {cm}^{2}$ )	FF	V_OC (V)	$η$ (%)	R_S (Ω)	$R_{CE}$ (Ω)	${R_{c}}_{t}$ (Ω)	$C_{μ}$ (μF)
Pure CdSe	12.351	0.382	0.417	1.96	20.25	630.5	194.8	12.25
$CdSe : {Mn}^{2 +}$ (20%)	18.990	0.381	0.520	3.77	17.05	204.5	24.65	120.9
$CdSe : {Cu}^{2 +}$ (0.3%)	19.915	0.421	0.503	4.22	19.29	254.4	8.681	160.5

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Ha Thanh Tung, Dang Huu Phuc, "Optical properties and dynamic process in metal ions doped on CdSe quantum dots sensitized solar cells," Chin. Opt. Lett. 16, 072501 (2018)

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Paper Information

Category: Optoelectronics

Received: Mar. 14, 2018

Accepted: May. 8, 2018

Published Online: Jul. 19, 2018

The Author Email: Dang Huu Phuc (danghuuphuc@tdt.edu.vn)

DOI:10.3788/COL201816.072501

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Composition of TiO2/CdS/CdSe:Cu2+/ZnS

Table 1. Composition of TiO2/CdS/CdSe:Cu2+/ZnS

Table 2. Composition of TiO2/CdS/CdSe:Mn2+/ZnS

Table 2. Composition of TiO2/CdS/CdSe:Mn2+/ZnS

Table 3. Eg, CB, and VB Positions of the Co-sensitized CdS/CdSe:Mn2+ (or Cu2+) Calculated by the Tauc equation and UV-Vis Spectra

Table 3. Eg, CB, and VB Positions of the Co-sensitized CdS/CdSe:Mn2+ (or Cu2+) Calculated by the Tauc equation and UV-Vis Spectra

Table 4. Values of J-V Curves and Electrochemical Impedance Spectra of the Pure CdS/CdSe and Co-sensitized CdS/CdSe:Mn2+ (or Cu2+) QDSSCs

Table 4. Values of J-V Curves and Electrochemical Impedance Spectra of the Pure CdS/CdSe and Co-sensitized CdS/CdSe:Mn2+ (or Cu2+) QDSSCs

Table 1. Composition of ${TiO}_{2} / CdS / CdSe : {Cu}^{2 +} / ZnS$

Table 1. Composition of ${TiO}_{2} / CdS / CdSe : {Cu}^{2 +} / ZnS$

Table 2. Composition of ${TiO}_{2} / CdS / CdSe : {Mn}^{2 +} / ZnS$

Table 2. Composition of ${TiO}_{2} / CdS / CdSe : {Mn}^{2 +} / ZnS$

Table 3. $E_{g}$ , CB, and VB Positions of the Co-sensitized $CdS / CdSe : {Mn}^{2 +}$ (or ${Cu}^{2 +}$ ) Calculated by the Tauc equation and UV-Vis Spectra

Table 3. $E_{g}$ , CB, and VB Positions of the Co-sensitized $CdS / CdSe : {Mn}^{2 +}$ (or ${Cu}^{2 +}$ ) Calculated by the Tauc equation and UV-Vis Spectra

Table 4. Values of J-V Curves and Electrochemical Impedance Spectra of the Pure CdS/CdSe and Co-sensitized $CdS / CdSe : {Mn}^{2 +}$ (or ${Cu}^{2 +}$ ) QDSSCs

Table 4. Values of J-V Curves and Electrochemical Impedance Spectra of the Pure CdS/CdSe and Co-sensitized $CdS / CdSe : {Mn}^{2 +}$ (or ${Cu}^{2 +}$ ) QDSSCs