A method for increase an open circuit voltage of a solar cell based on an additive
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A solar cell, open circuit voltage technology
Inactive Publication Date: 2018-12-21
HUAZHONG UNIV OF SCI & TECH
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However, the open circuit voltage of the device is low, which restricts the further improvement of device performance
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preparation example Construction
[0027] The method for improving the open circuit voltage of perovskite solar cells based on additives in the present invention is to introduce additives into perovskite materials, thereby improving the open circuit voltage of perovskite solar cells; the preparation method of corresponding solar cells, in general, The method is to sequentially prepare a transparent conductive layer, a charge transport layer, an insulating layer, and a carbon counter electrode layer on the substrate, and then fill the precursor liquid in the three-layer mesoporous film structure, and complete the device preparation after annealing; specifically, the following steps may be included:
[0028] (1) Prepare a transparent conductive layer, a charge transport layer, an insulating layer, and a carbon electrode sequentially on a substrate; these transparent conductive layers, a charge transport layer, an insulating layer, and a carbon electrode layer are preferably mesoporous, with a total thickness of 13 ...
Embodiment 1
[0033] (1) sequentially prepare a transparent conductive layer, a charge transport layer, an insulating layer and a carbon electrode on the substrate;
[0034] (2) Prepare a clear and transparent perovskite precursor solution without adding guanidine hydrochloride, wherein the perovskite content is 1M;
[0035] (3) Fill the blank device with 2.5 μL perovskite precursor solution and anneal at 100 °C for 5 min.
Embodiment 2
[0037] (1) sequentially prepare a transparent conductive layer, a charge transport layer, an insulating layer and a carbon electrode on the substrate;
[0038] (2) Add guanidine hydrochloride in an amount of 0.25 mol / L to the perovskite precursor solution, stir evenly, and obtain a clear and transparent precursor solution, wherein the perovskite content is 1M;
[0039] (3) Fill the blank device with 2.5 μL perovskite precursor solution and anneal at 100 °C for 5 min.
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Abstract
The invention discloses a method for increasing the open circuit voltage of a solar cell based on an additive, which takes a solar cell containing a perovskite material as an object, in particular, doping an additive into the perovskite material of the solar cell, wherein the additive is an additive containing guanidine ion and halogen ion. The invention improves the specific kinds of additives and the like, Guanidine hydrochloride or guanidine iodate are use as additives, Compared with the prior art, the invention can effectively improve the open-circuit voltage of the solar cell by introducing an additive into the perovskite material in the solar cell, thereby passivating the internal defects of the device, reducing the carrier loss and effectively improving the open-circuit voltage of the perovskite solar cell. The invention has the advantages of simple process, low cost, friendly environment, high practical value, and the highest open circuit voltage of 1.02 V can be obtained.
Description
technical field [0001] The invention belongs to the field of solar cells, and more specifically relates to a method for increasing the open-circuit voltage of solar cells based on additives, and is especially suitable for perovskite solar cells. Background technique [0002] As an inexhaustible and inexhaustible green new energy, solar energy has a broad space for development and utilization. Silicon solar cells are the earliest to be developed, with mature technology, stable performance and high efficiency, occupying a considerable share in the photovoltaic industry market. However, the high energy consumption in its production process limits the further reduction of the cost of crystalline silicon solar cells to a certain extent. Among the many new solar cells, perovskite solar cells are developing rapidly. At present, the photoelectric conversion efficiency of 22.7% has been notarized, which is comparable to silicon-based solar cells. Therefore, it has attracted widespre...
Claims
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Application Information
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