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Research on Large-area Monolithic All-solid-state Dye-sensitized Solar Cell Module

Author: RongYaoGuang
Tutor: HanHongWei
School: Huazhong University of Science and Technology
Course: Optical Engineering
Keywords: large-area monolithic all-solid-state dye-sensitized solar cell stability
CLC: TM914.4
Type: Master's thesis
Year: 2011
Downloads: 121
Quote: 0
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Abstract


In 1991, Dye-sensitized solar cell（DSSC） was invented by Prof. M. Gr（a|¨）tzel of Ecole Polytechnique Federal de Lausanne. Due to its advantages of simple manufacturing process, production cost and environment friendly, it has been being paid much attention, and was considered as a typical representation of the next generation solar cells. However, the conventional DSSC modules contain a liquid electrolyte. It is well known that liquid electrolyte based DSSCs always couple with leakage, electrode corrosion and other problems, which blocks the further applications of DSSCs.This thesis report a carbon counter electrode based monolithic all-solid-state DSSC module with the size of 10cm×10cm, which the electrolyte was replaced by solid state versions and the counter electrode was played by carbon materials. Obviously, these devices were fabricated with simple and low-cost procedures entirely based on screen-printing, which open up a path to rapid commercial development of DSSC. There are four parts within this thesis.The fabrication and optimization of test cells: With screen-printing technology, we print each layer such as nanocrystalline TiO2 layer, insulate layer and counter electrode layer of 4×5 test cells on a single conducting substrate with the size of 10cm×10cm. Due to the employing of screen-printing technology, the thicknesses of all these three layers are controlled precisely, and the performance of different test cells seems uniform, which makes the data more reliable. Moreover, the reproducibility of the fabricating process is excellent. Comparing the performance of test cells with different working electrodes and counter electrodes, we have collected the parameter for fabricating monolithic all-solid-state DSSCs.The fabrication of monolithic liquid-state DSSCs with different size: using screen-printing technology, we have fabricated 6 monolithic DSSCs with the same length, but different width on a single substrate. After sealing, a liquid-state electrolyte was applied. Comparing the performance of the cells, we have analyzed the influence of active area on the parameters of the cell.The fabrication of large-area monolithic all-solid-state DSSC modules: using screen-printing technology, we have fabricated 5 series-connected unit cells on a single conducting substrate with the size of 10cm×10cm. The module offers a power of 156.6 mW for maximum, and shows short-circuit photocurrent of 70.1mA, open-circuit voltage of 3.70V and FF of 60.1%. The overall energy conversion efficiency has been achieved to 2.61% with 60 cm2 active area.Stability test: In order to study the stability of the monolithic solid-state DSSC module, we have performed a stability test under high temperature condition for over 1000h after encapsulated. The result indicates this kind of monolithic all-solid-state DSSC module exhibits quit good stability.

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CLC: > Industrial Technology > Electrotechnical > Independent power supply technology (direct power) > Photocell > Solar cells
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