Improving Heat Transfer Enables Durable Perovskite Solar Cells

Abstract

Special attention should be devoted to the thermal stability of hybrid perovskite solar cells (PSCs), because they are often operated at elevated temperatures. However, effective strategies are lacking for manipulation of heat flow in PSCs to improve their thermal stability. Here, a holistic solution is reported for the rapid removal of dissipated heat within the absorber by introducing hexagonal boron nitride (h‐BN) inside and radiator fin outside of the device. This strategy significantly improves the thermal conductivity of perovskite and speeds up the heat transfer of device, which effectively reduces the cell temperature under illumination of simulated AM 1.5G standard spectrum by ≈6.5 °C. Regardless of device configurations, the corresponding PSCs exhibit prolonged lifetimes aged at different temperatures, continuously operated under white light‐emitting diode (LED) lamp or full‐spectrum illumination. Of particular note, the optimized h‐BN/Cu device with n–i–p structure keeps 88% and 93% of its initial PCE after 1776 h of 85 °C thermal aging and 2451 h of maximum power point (MPP) tracking, respectively, and the device with p–i–n structure maintains 96% and 92% of its original PCE after 1704 h of 85 °C thermal aging and 2164 h of MPP tracking.

A residual strain regulation strategy based on quantum dots for efficient perovskite solar cells

“…All the perovskite lms have diffraction peaks at 14.1°and 28.2°corresponding to the (001) and (002) planes of FAPbI 3 , which is consistent with previous research results. [29][30][31][32] This also indicates that the introduction of the CsPbI 3 QDs does not change the phase and crystal structure of the perovskite lms. The intensities of the (001) and (002) orientation peaks of the QD treated lm are higher than those of the control lm.…”

Room temperature nondestructive encapsulation via self-crosslinked fluorosilicone polymer enables damp heat-stable sustainable perovskite solar cells

“…After heat treatment at 85 °C for 500 h, a large amount of PbI 2 appeared in the perovskite film with UV resin encapsulation (Fig. 2f), revealing that the heat accumulation might cause the loss of organic components and the decomposition of the perovskite 44 . As a comparison, few PbI 2 was observed at the surface of the perovskite film with target encapsulation after aging (Fig.…”

Thermodynamic Processes of Perovskite Photovoltaic Devices: Mechanisms, Simulation, and Manipulation

“…In addition, the thermal effect can be directly related to the initial efficiency of PSCs, because a large amount of evidences has confirmed that the effective thermal management could reduce the device temperature and thus raise the device efficiency. [ 12 ] For instance, Zhou et al reported an innovative method by introducing the silicon dioxide particles with highly thermal conductivity into the hole transport layer (HTL) to serve as the heat dissipation material. As a result, the resultant devices achieve substantially improved long‐term stability with the unencapsulated devices maintaining 91%, 95%, and 98% of their initial PCEs after 1126 h of thermal aging, 1235 h of SPO tracking, and 2000 h of ambient aging, respectively.…”

“…In addition, the thermal effect can be directly related to the initial efficiency of PSCs, because a large amount of evidences has confirmed that the effective thermal management could reduce the device temperature and thus raise the device efficiency. [12] For instance, Zhou et al reported an innovative method by introducing the silicon dioxide particles with highly thermal conductivity into the hole transport layer (HTL) to serve as the heat dissipation material. As a result, the resultant…”