A solution-processed organic-inorganic planar heterojunction solar cell and its preparation
A technology of solution processing and solar cells, applied in organic semiconductor devices, sustainable manufacturing/processing, circuits, etc., can solve the problems of high cost of organic materials, achieve improved film formation, high efficiency, improved energy consumption and large-scale production problem effect
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Embodiment 1
[0053] Embodiment 1: the preparation of photoactive layer material
[0054] CH of the compound A 3 NH 3 I. CH 3 NH 3 Br, CH 3 NH 3 Cl, CH 3 CH 2 NH 3 I. CH 3 CH 2 NH 3 Br, CH 3 CH 2 NH 3 Cl, CH 3 CH 2 CH 2 NH 3 I. CH 3 CH 2 CH 2 NH 3 Br, CH 3 CH 2 CH 2 NH 3 Cl, CH(NH 2 ) 2 I, CH(NH 2 ) 2 Br, CH(NH 2 ) 2 Cl, CH 3 CH(NH 2 ) 2 I. CH 3 CH(NH 2 ) 2 Br, CH 3 CH(NH 2 ) 2 Cl. The synthesis of is prepared according to the method in the literature (J.Am.Chem.Soc.2012,134,17396-17399).
[0055] CH 3 NH 3 PB 3 The synthesis of CH 3 NH 3 I and PbI 2 It is co-dissolved in γ-butyrolactone or other organic solvents and reacted, as follows:
[0056] Take CH 3 NH 3 I (32mg) and PbI 2 (93 mg) was blended and dissolved in 1 mL of γ-butyrolactone, heated to 60° C., and stirred for 12 hours to obtain the photoactive layer material.
[0057] The preparation of photoactive layer materials containing polymer additives is as follows:
[0058] Add CH ...
Embodiment 2
[0061] Embodiment 2: the preparation of organic-inorganic heterojunction solar cell:
[0062] Pre-cut the ITO conductive glass with a square resistance of 20 ohms / cm2 into 15mm×15mm square pieces. Use acetone, special detergent for micron-sized semiconductors, deionized water, and isopropanol to clean ultrasonically in sequence, and then place it in a constant temperature oven for later use after purging with nitrogen. Before use, the ITO glass slides were bombarded with plasma in an oxygen plasma etcher for 10 min. PEDOT:PSS aqueous dispersion (about 1%) was purchased from Bayer, and the buffer layer was spin-coated at a high speed using a homogenizer (KW-4A), and the thickness was determined by the solution concentration and rotating speed. 500 type) measured monitoring. After film formation, remove solvent residue and vertical film in a constant temperature vacuum oven. The film thickness of PEDOT:PSS on the ITO substrate is preferably about 40 nanometers. The cathode i...
Embodiment 3
[0069] Example 3: Photovoltaic performance of organic-inorganic heterojunction solar cells with different photoactive layer materials
[0070] CH 3NH 3 PB 3 , CH 3 NH 3 PB x Cl 3-x and CH 3 NH 3 PB x Br 3-x (x is less than 3, greater than 0) is to measure the photovoltaic performance of the organic-inorganic heterojunction solar cell prepared from the photoactive layer material, and the results are shown in Table 2.
[0071] Table 2 Battery device performance indicators of different photoactive layer materials
[0072]
Voc(V)
Jsc(mA / cm2)
FF(%)
PCE(%)
CH 3 NH 3 PB 3
0.71
7.47
44.6
2.37
CH 3 NH 3 PB x Cl 3-x
0.94
10.19
64.9
6.21
CH 3 NH 3 PB x Br 3-x
1.01
2.55
42.4
1.09
[0073] It can be seen from Table 2 that by changing the composition of the active layer material and increasing the content of bromine element or chlorine element therein, the performance of t...
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