The paper reports a significant electrocaloric effect (ECE) in 300 nm sol-gel PbZr$_{0.95}$Ti$_{0.05}$O$_3$ thin films, demonstrating a temperature change of 0.48 K V$^{-1}$ near the ferroelectric Curie temperature of 222°C. This effect is much larger than previously observed in bulk samples, such as Pb$_{0.99}$Nb$_{0.02}$(Zr$_{0.75}$Sn$_{0.20}$Ti$_{0.05}$)$_{0.98}$O$_3$, where the ECE effect was only 0.003 K V$^{-1}$. The study also discusses a solid-state device concept for electrical refrigeration that could outperform Peltier or magnetocaloric coolers. The results provide insights into the macroscopic models of the ECE effect and may inspire further $ab initio$ calculations to identify new materials with enhanced ECE properties. The authors propose that the ECE effect in these thin films could be used in an efficient solid-state heat pump, potentially offering a cooling solution for electronic components like computer chips.The paper reports a significant electrocaloric effect (ECE) in 300 nm sol-gel PbZr$_{0.95}$Ti$_{0.05}$O$_3$ thin films, demonstrating a temperature change of 0.48 K V$^{-1}$ near the ferroelectric Curie temperature of 222°C. This effect is much larger than previously observed in bulk samples, such as Pb$_{0.99}$Nb$_{0.02}$(Zr$_{0.75}$Sn$_{0.20}$Ti$_{0.05}$)$_{0.98}$O$_3$, where the ECE effect was only 0.003 K V$^{-1}$. The study also discusses a solid-state device concept for electrical refrigeration that could outperform Peltier or magnetocaloric coolers. The results provide insights into the macroscopic models of the ECE effect and may inspire further $ab initio$ calculations to identify new materials with enhanced ECE properties. The authors propose that the ECE effect in these thin films could be used in an efficient solid-state heat pump, potentially offering a cooling solution for electronic components like computer chips.