<p>Optimal device architecture and material parameters are essential for achieving high device performance. In line with this, we have evaluated the impact of density of states on thin film solar cells. Numerical simulations highlighted that a lower density of state (DOS) results in low effective mass which is beneficial in terms of increased mobility. The simulated J-V characteristics of <i>p-n</i>⁺<i>-n</i>⁺⁺ configuration solar cells for various DOS values showed that efficiency and V_OC increases with decreasing DOS, whereas J_SC increases with increasing DOS. This is due to the fact that absorption increases with increasing DOS, while mobility increases with decreasing DOS. The study showed that the rise in V_OC at lower DOS is higher and dominant than the increases in J_SC at higher DOS. Thus, low DOS is one of the crucial requirements in absorber materials for high performance solar cells.Please confirm if the author names are presented accurately and in the correct sequence (given name, middle name/initial, family name). Author 1 Given name: [Prabakaran Maruthamuthu] Last name [Paramasivam], Author 2 Given name: [R. Thandaiah] Last name [Prabu], Author 3 Given name [Arun kumar] Last name [Selvam] Also, kindly confirm the details in the metadata are correct.All correct</p>