Record-efficiency flexible perovskite solar cell and module enabled by a porous-planar structure as an electron transport layer

Abstract

A facile and low-temperature process to prepare planar perovskite solar cells (PSCs) has led to considerable progress in flexible solar cells toward high throughput production based on a roll-to-roll process....

Inverted perovskite solar cells with enhanced lifetime and thermal stability enabled by a metallic tantalum disulfide buffer layer

“…The burn-in behaviour is common in organic PVs 71,72 and is even oen observed in PSCs. [73][74][75] However, in the latter case, the initial losses are oen recovered when devices are le to rest under dark 76 Therefore, the linear decay regime of the device was used to estimate the device lifetime. By considering the time at the end of the burn-in phase (T burn-in ), the time at which the PCE drops by 20% compared to T burn-in , T s80 represents a usual metric for the PSC stability.…”

Emerging Perovskite Solar Cell Technology: Remedial Actions for the Foremost Challenges

“…The PCE of these devices varies in the wide range from 1.8% to ≈23.2%. [ 3,67–70 ] A key advantage of this structure is the low‐temperature processibility, especially as compared to the mesoporous structure which generally requires high temperature prolonged sintering. However, the HTL remains an issue for both mesoporous and regular planar structures.…”

A Perspective on the Commercial Viability of Perovskite Solar Cells

“…[ 209–214 ] Modules on plastic substrates, where series‐connected cells were fully monolithically patterned by laser ablation, have reached efficiencies in the ≈10−15% range depending on size and device architecture. [ 213,215–217 ] Nevertheless, fPSCs have always resulted in lower PCEs compared with their FTO–glass counterpart, basically due to three reasons: 1) high‐performing PSCs require heat treatment of TiO 2 to 400−500 °C, which is too high for flexible substrates such as PET, [ 218–220 ] 2) different wetting and transparency versus sheet resistance properties, [ 221–223 ] and 3) higher roughness in ITO–PET substrate compared with ITO–glass results in incomplete coverage of ETLs or HTLs, inducing degradation and current leakage. [ 212,224,225 ] Yang et al replaced TiO 2 with SnO 2 (fabrication temperature: ≈150 °C), showing outstanding PCE of 17%; a further development with PCE ≈16% in the large‐area module would trigger market possibilities.…”