Perovskite Solar Cell Module Layout for High-Illuminance Durability
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Solution Overview
Problem
Existing solar cell modules with perovskite layers experience a significant decrease in power generation efficiency after prolonged exposure to high illuminance due to electron recombination and low adhesiveness between the hole transport layer and the second electrode, leading to durability issues.
Innovation Solution
A solar cell module design featuring extended continuous hole transport layers that separate the first electrodes, electron transport layers, and perovskite layers, utilizing a polymer or compound with a weight average molecular weight of 2,000 or more to reduce electron recombination and enhance durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional hole transport layers are used in perovskite solar cells, then the device can be manufactured with existing printing units, but the power generation efficiency decreases significantly after prolonged exposure to high illuminance due to electron recombination
Solution Approach 1:
The patent changes the molecular weight parameter of the hole transport material to 2,000 or more, which fundamentally alters the material's electronic properties. This parameter change reduces electron recombination in the hole transport layer while maintaining compatibility with existing printing manufacturing units, thereby resolving the contradiction between ease of manufacture and reliability under high illuminance
Solution Approach 2:
The patent employs composite material design by combining the high molecular weight hole transport material with specific perovskite layer compositions. This composite approach creates a synergistic effect where the hole transport layer and perovskite layer work together to minimize electron recombination, improving power generation efficiency while maintaining manufacturability
2Ease of manufacture
If the hole transport layer is made with lower molecular weight materials, then the manufacturing process is simpler, but the adhesiveness between the hole transport layer and the second electrode is insufficient
Solution Approach 1:
The patent increases the molecular weight parameter of the hole transport material to 2,000 or more, which enhances the material's adhesive properties. This parameter change improves the bonding strength between the hole transport layer and the second electrode while maintaining compatibility with existing printing manufacturing processes
Solution Approach 2:
The patent ensures continuous and uniform deposition of the hole transport layer through optimized printing processes. This continuity of the deposition action creates a uniform film with consistent adhesive properties across the entire electrode surface, maintaining strong adhesion without complicating the manufacturing process
3Power
If photoelectric conversion elements are spatially separated to form series circuits, then the output voltage increases, but the power generation efficiency decreases after prolonged light exposure
Solution Approach 1:
The patent applies the molecular weight parameter change to the hole transport material in spatially separated photoelectric conversion elements connected in series. This parameter change ensures that each element maintains high efficiency under prolonged illumination, allowing the series circuit to sustain high output voltage without significant efficiency degradation over time
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design maintains power generation efficiency and increases durability by minimizing electron recombination and improving adhesiveness, allowing the module to perform effectively under high illuminance for extended periods.
Implementation Method 1
solar cells using a photoelectric conversion element
Implementation Method 2
a hole transport layer, and a second electrode... the hole transport layers are extended continuous layers
Data Source
AI summary
A solar cell module includes a first substrate and a plurality of photoelectric conversion elements disposed on the first substrate. Each of the plurality of photoelectric conversion elements includes a first electrode, an electron transport layer, a perovskite layer, a hole transport layer, and a second electrode. In at least two of the photoelectric conversion elements adjacent to each other, the hole transport layers are extended continuous layers; and the first electrodes, the electron transport layers, and the perovskite layers in the at least two of the photoelectric conversion elements adjacent to each other are separated by the hole transport layer. The hole transport layer includes, as hole transport material, a polymer having a weight average molecular weight of 2,000 or more or a compound having a molecular weight of 2,000 or more.