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

Journals >Chinese Optics Letters >Volume 16 >Issue 7 >Page 072501 > Article

Chinese Optics Letters
Vol. 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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DOI: 10.3788/COL201816.072501 Cite this Article Set citation alerts

Ha Thanh Tung, Dang Huu Phuc. Optical properties and dynamic process in metal ions doped on CdSe quantum dots sensitized solar cells[J]. Chinese Optics Letters, 2018, 16(7): 072501 Copy Citation Text

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(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:Mn2+ (or Cu2+). (g), (h) XRD patterns of co-sensitized CdS/CdSe:Mn2+ (or Cu2+) QDSSCs.

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 +}

{Cu}^{2 +}

) QDSSCs and (b) Nyquist curves of pure CdSe and CdSe:X-QDSSCs.

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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 1. Composition of

{TiO}_{2} / CdS / CdSe : {Cu}^{2 +} / ZnS

View in the Article

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 2. Composition of

{TiO}_{2} / CdS / CdSe : {Mn}^{2 +} / ZnS

View in the Article

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 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

View in the Article

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

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

Ha Thanh Tung, Dang Huu Phuc. Optical properties and dynamic process in metal ions doped on CdSe quantum dots sensitized solar cells[J]. Chinese Optics Letters, 2018, 16(7): 072501

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