Frontiers of Materials Science >
Influence of acid and alkaline sources on optical, structural and photovoltaic properties of CdSe nanoparticles precipitated from aqueous solution
Received date: 16 Dec 2015
Accepted date: 03 Mar 2016
Published date: 11 May 2016
Copyright
CdSe is a widely researched material for photovoltaic applications. One of the most important parameters of the synthesis is the pH value, since it determines the kinetics and the mechanism of the reaction and in consequence, the optical and morphological properties of the products. We present the synthesis of CdSe in solution with strict control of pH and the comparison of ammonia and KOH as alkaline sources and diluted HCl as acid medium. CdSe formation was monitored with photoluminescence emission spectra (main peak in 490 nm, bandgap of CdSe nanoparticles). XRD patterns indicated that CdSe nanoparticles are mainly of cubic structure for ammonia and HCl, but the hexagonal planes appear with KOH. Product yield decreases with pH and also decreases with KOH at constant pH value since ammonia has a double function, as complexing agent and alkaline source. Changes in morphology were observed in SEM images as well with the different alkaline source. The effect of alkaline sources on photovoltaic performance of hybrid organic solar cells with CdSe and poly(3-hexylthiophene) as active layers was clearly observed, indicating the importance of synthesis conditions on optoelectronic properties of promising semiconductor nanomaterials for solar cell applications.
Key words: CdSe; optical properties; morphological properties; hybrid solar cells
C. Selene CORIA-MONROY , Mérida SOTELO-LERMA , Hailin HU . Influence of acid and alkaline sources on optical, structural and photovoltaic properties of CdSe nanoparticles precipitated from aqueous solution[J]. Frontiers of Materials Science, 2016 , 10(2) : 168 -177 . DOI: 10.1007/s11706-016-0336-x
1 |
Hodes G. Chemical Solution Deposition of Semiconductor Films. New York: CRC Press, 2002, 381
|
2 |
Kitaev G A, Uritskaya A A, Mokrushin S G. ZnO/CdS/CuInSe2 photovoltaic cells fabricated using chemical bath deposited CdS buffer layer. Russian Journal of Physical Chemistry, 1965, 39: 1101
|
3 |
Kainthla R C, Pandya D K, Chopra K L. Solution growth of CdSe and PbSe films. Journal of the Electrochemical Society, 1980, 127(2): 277–283
|
4 |
Park Y S, Okamoto Y, Kaji N,
|
5 |
Murray C B, Norris D J, Bawendi M G. Synthesis and characterization of nearly monodisperse CdE (E= sulfur, selenium, tellurium) semiconductor nanocrystallites. Journal of the American Chemical Society, 1993, 115(19): 8706–8715
|
6 |
Hines M A, Guyot-Sionnest P. Synthesis and characterization of strongly luminescing ZnS-capped CdSe nanocrystals. The Journal of Physical Chemistry, 1996, 100(2): 468–471
|
7 |
Qu L, Peng X. Control of photoluminescence properties of CdSe nanocrystals in growth. Journal of the American Chemical Society, 2002, 124(9): 2049–2055
|
8 |
Rogach A L, Katsikas L, Kornowski A,
|
9 |
Rajh T, Ostafin A E, Micic O I,
|
10 |
Chen F, Gerion D. Fluorescent CdSe/ZnS nanocrystal-peptide conjugates for long-term, nontoxic imaging and nuclear targeting in living cells. Nano Letters, 2004, 4(10): 1827–1832
|
11 |
Chandler R R, Coffer J L, Gutsche C D,
|
12 |
Schneider R, Lavinia B. Nanotechnology and nanomaterials. In: Al-Ahmadi A, ed. State of the Art of Quantum Dot System Fabrications. InteO, 2012, 119–140
|
13 |
Rogach A L, Kornowski A, Gao M,
|
14 |
Kainthla R C, Pandya D K, Chopra K L. Solution growth of CdSe and PbSe films. Journal of the Electrochemical Society, 1980, 127(2): 277–283
|
15 |
Rieke P C, Bentjen S B. Deposition of cadmium sulfide films by decomposition of thiourea in basic solutions. Chemistry of Materials, 1993, 5(1): 43–53
|
16 |
Yochelis S, Hodes G. Nanocrystalline CdSe formation by direct reaction between Cd ions and selenosulfate solution. Chemistry of Materials, 2004, 16(14): 2740–2744
|
17 |
Kaur I, Pandya D K, Chopra K L. Growth kinetics and polymorphism of chemically deposited CdS films. Journal of the Electrochemical Society, 1980, 127(4): 943–948
|
18 |
Coria-Monroy C S, Martínez-Alonso C, Sotelo-Lerma M,
|
19 |
Fasoli A, Colli A, Martelli F,
|
20 |
Nair P K, Nair M T S, Garcia V M,
|
21 |
Cortina-Marrero H J, Nair P K, Hu H. Conductive carbon paint as an anode buffer layer in inverted CdS/poly(3-hexylthiophene) solar cells. Solar Energy, 2013, 98: 196–202
|
22 |
Williams J V, Adams C N, Kotov N A,
|
23 |
Chu V H, Nghiem T H L, Le T H,
|
24 |
Cortina H, Martínez-Alonso C, Castillo-Ortega M,
|
/
〈 | 〉 |