Semiconductor nanocrystalline sensitized solar cell and preparation method thereof

A technology of solar cells and nanocrystals, applied in photosensitive devices, circuits, capacitors, etc., can solve environmental hazards, toxicity and other problems, and achieve the effects of simple preparation process, excellent photovoltaic performance, and excellent photoelectric performance of batteries

Active Publication Date: 2013-04-03
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the semiconductor nanocrystals currently used are cadmium or lead compounds (such as cadmium sulfide, cadmium selenide, lead sulfide, lead selenide, etc.), due to

Method used

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  • Semiconductor nanocrystalline sensitized solar cell and preparation method thereof
  • Semiconductor nanocrystalline sensitized solar cell and preparation method thereof
  • Semiconductor nanocrystalline sensitized solar cell and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0025] Example 1.

[0026] Prepare porous tin oxide film, take 5.1g SnO 2 , Add appropriate amount of ethanol and ultrasonically uniformly disperse; mix 2.7 g ethyl cellulose and 12.2 g terpineol evenly, add the above SnO 2 / Ethanol mixture, and put it in an ultrasonic disintegrator to make it evenly dispersed. After placing the obtained mixture in a rotary evaporator to remove ethanol, a uniform and viscous SnO is obtained 2 Slurry. SnO 2 The slurry is placed in the screen, and the ink is evenly coated, and the film is brushed on the FTO conductive surface, and then it is allowed to stand for 6 minutes to flatten it, and then placed in a 125 ℃ oven for heat treatment for 6 minutes. Use a field emission scanning electron microscope (LEO-1530, Germany) to observe the new microscopic appearance of the photoanode, such as figure 1 Shown. The thickness of the printed 1-layer paste measured by the XP-1 step tester is about 4 μm. Put the FTO glass with the porous film into the muffle...

Example Embodiment

[0031] Example 2.

[0032] SnO was prepared by the same method as in Example 1. 2 Slurry, screen printing 1 layer of slurry, take out the glass after sintering and cooling, soak it to contain TiCl 4 Heat the solution in an airtight container at 70 ℃ for 20 min. After cooling, take out the glass, rinse with deionized water, and put it in a muffle furnace and sinter at 500 ℃ for 30 min to complete the titanium oxide coating of the porous tin oxide film. Coating treatment, the thickness of the titanium oxide layer is 1~2 nm. Use the same method as in Example 1 to prepare Ag 2 S nanocrystalline sensitized photoanode, the same electrolyte and counter electrode materials as in Example 1, the short-circuit current density of the prepared battery is 5.2 mA / cm 2 , The open circuit voltage is 448.8 mV, the fill factor is 0.372, and the photoelectric conversion efficiency is 0.87%.

Example Embodiment

[0033] Example 3. Preparation of SnO by the same method as in Example 1 2 The paste was screen printed with two layers of paste, and the same sintering process and titanium oxide coating process as in Example 2 were used. The thickness of the tin oxide film measured with the XP-1 step tester was about 8 μm. Use the same method as in Example 1 to prepare Ag 2 S nanocrystal sensitized photoanode, the same electrolyte and counter electrode materials as in Example 1, the short-circuit current density of the prepared battery is 8.3 mA / cm 2 , The open circuit voltage is 405.2 mV, the fill factor is 0.363, and the photoelectric conversion efficiency is 1.22%.

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Abstract

The invention belongs to the technical field of green renewable energy and relates to a semiconductor nanocrystalline sensitized solar cell and a preparation method thereof. The semiconductor nanocrystalline sensitized solar cell is characterized in that a photoanode is sensitized with silver sulfide nanocrystalline. The photoanode sensitized with the silver sulfide nanocrystalline is non-toxic, the prepared silver sulfide nanocrystalline solar cell is green, nontoxic, environment-friendly, simple in preparation process and has excellent photovoltaic property. In addition, due to the fact that silver sulfide has appropriate energy gap, excellent cell photoelectric property is achieved.

Description

technical field [0001] The invention belongs to the technical field of green renewable energy, and in particular relates to a semiconductor nanocrystal sensitized solar cell and a preparation method thereof. Background technique [0002] Semiconductor nanocrystal sensitized solar cell is a new type of photovoltaic cell. It uses semiconductor nanocrystal as light-absorbing material. When the size of nanocrystal is smaller than its Bohr radius, it becomes quantum dot. Quantum dots are quasi-zero-dimensional nanomaterials (usually narrow-bandgap semiconductor materials), the movement of electrons in them is restricted in all directions, and have significant quantum confinement effects, which have the following advantages: (1 ) can change the bandgap width by adjusting the particle size of quantum dots, so as to realize the full-spectrum absorption of sunlight; (2) There are many types of inorganic semiconductors to choose from, the cost is low, and the process is simple; (3) Co...

Claims

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Application Information

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IPC IPC(8): H01G9/20H01G9/042
CPCY02E10/549Y02P70/50
Inventor 林红申何萍焦星剑
Owner TSINGHUA UNIV
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