TY - JOUR
T1 - High efficiency and durability from perovskite–organic hybrid light-emitting diodes
AU - Matsushima, Toshinori
AU - Qin, Chuanjiang
AU - Potscavage, William J.
AU - Sandanayaka, Atula S.D.
AU - Leyden, Matthew R.
AU - Bencheikh, Fatima
AU - Goushi, Kenichi
AU - Mathevet, Fabrice
AU - Heinrich, Benoît
AU - Yumoto, Go
AU - Kanemitsu, Yoshihiko
AU - Adachi, Chihaya
N1 - Publisher Copyright:
© 2020 ITE and SID.
PY - 2021/12/9
Y1 - 2021/12/9
N2 - Perovskite light-emitting diodes are promising for next-generation lighting and displays. However, the nature of how excitons affect performance is still not clear in perovskite and quasi-two-dimensional (2D) perovskite-based devices. Here, we show that triplet excitons are key to efficient emission in green quasi-2D perovskite devices and that quenching of triplets by the organic cation is a major loss path. Employing an organic cation with a high triplet energy level (phenylethylammonium) in a quasi-2D perovskite based on formamidinium lead bromide yields efficient harvesting of triplets. Furthermore, we show that upconversion of triplets to singlets can occur, making 100% harvesting of electrically generated excitons potentially possible.
AB - Perovskite light-emitting diodes are promising for next-generation lighting and displays. However, the nature of how excitons affect performance is still not clear in perovskite and quasi-two-dimensional (2D) perovskite-based devices. Here, we show that triplet excitons are key to efficient emission in green quasi-2D perovskite devices and that quenching of triplets by the organic cation is a major loss path. Employing an organic cation with a high triplet energy level (phenylethylammonium) in a quasi-2D perovskite based on formamidinium lead bromide yields efficient harvesting of triplets. Furthermore, we show that upconversion of triplets to singlets can occur, making 100% harvesting of electrically generated excitons potentially possible.
UR - http://www.scopus.com/inward/record.url?scp=85119996440&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85119996440&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:85119996440
SN - 1883-2490
VL - 27
SP - 385
EP - 387
JO - Proceedings of the International Display Workshops
JF - Proceedings of the International Display Workshops
T2 - 27th International Display Workshops, IDW 2020
Y2 - 9 December 2020 through 11 December 2020
ER -