Photovoltaic Device Active Layer Formula 1 Structure
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Solution Overview
Problem
Photovoltaic devices with organic layers containing macromolecular compounds have unsatisfactory short-circuit current density and photoelectric conversion efficiency.
Innovation Solution
Incorporation of a compound with a specific structural unit represented by Formula (1) in the active layer of the photovoltaic device, which includes a divalent group with a trivalent aromatic or heterocyclic group and specific bonding configurations, enhancing the device's performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a macromolecular compound containing repeated units (A) and (B) is used in the organic layer, then the device can be produced at low cost by coating process, but the short-circuit current density and photoelectric conversion efficiency are unsatisfactory
Solution Approach 1:
The patent changes the chemical structure parameters of the macromolecular compound by introducing a specific divalent structural unit with trivalent aromatic or heterocyclic groups (Ar1 and Ar2) connected through heteroatoms (X1 and X2). This structural modification improves photoelectric conversion efficiency while maintaining the coating process manufacturing method
Solution Approach 2:
The patent creates a composite macromolecular structure by combining specific structural units (Formula 1) with electron-accepting units in the active layer. This composite approach enhances the photoelectric conversion efficiency through improved charge separation and transport while keeping the low-cost coating manufacturing process
2Ease of manufacture
If a macromolecular compound containing repeated units (A) and (B) is used in the organic layer, then the device can be produced at low cost by coating process, but the short-circuit current density is unsatisfactory
Solution Approach 1:
The patent modifies the molecular structure parameters by incorporating the specific divalent structural unit (Formula 1) with trivalent aromatic or heterocyclic groups, which enhances light absorption and charge generation capabilities, thereby improving short-circuit current density while maintaining cost-effective coating manufacturing
Solution Approach 2:
The patent introduces specific functional groups (X1 and X2 representing O, S, C(=O), Si, N, B, or P) at strategic positions within the macromolecular structure to enhance local electron-accepting properties and charge transport, which improves short-circuit current density without affecting the overall manufacturing process
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 photovoltaic device exhibits improved short-circuit current density and photoelectric conversion efficiency, making it more effective in energy conversion.
Implementation Method 1
a photovoltaic device which comprises: a first electrode; a second electrode; and an active layer between the first electrode and the second electrode, wherein the active layer contains a compound having a structural unit represented by Formula (1)
Data Source
AI summary
The present invention provides a photovoltaic cell having a large short-circuit current density and a large photoelectric conversion efficiency.This photovoltaic cell comprises:a first electrode;a second electrode; andan active layer between the first electrode and the second electrode;wherein the active layer contains a compound having a structural unit represented by Formula (1):wherein Ar1 and Ar2 are the same as or different from each other and represent a trivalent aromatic hydrocarbon group or a trivalent heterocyclic group, with at least one of Ar1 and Ar2 being a trivalent heterocyclic group; X1 and X2 are the same as or different from each other and represent —O—, —S—, —C(═O)—, —S(═O)—, —SO2—, —C(R50)(R51)—, —Si(R3)(R4)—, —N(R5)—, —B(R6)—, —P(R7)—, or —P(═O)(R8)—; R50, R51, R3, R4, R5, R6, R7, and R8 are the same as or different from each other and represent a hydrogen atom, a halogen atom, or a monovalent organic group; and X1 and Ar2 are bonded with atoms adjacent to each other on a ring that constitutes Ar1, and X2 and Ar1 are bonded with atoms adjacent to each other on a ring that constitutes Ar2.